Miguel wrote:

> I just checked in code which defines the nucleic-related things.
> The definitions are equivalent to the following:
>
> define a [A],[+A]
> define g [G],[+G]
> define c [C],[+C]
> define t [T],[+T]
>
> define i [I],[+I]
> define u [U],[+U]
>
> define purine [A],[+A],[G],[+G],[I],[+I]
> define pyrimidine [C],[+C],[T],[+T],[U],[+U]
>
> define nucleic [A],[+A],[G],[+G],[C],[+C],[T],[+T],[I],[+I],[U],[+U],\
> [1MA],[5MC],[OMC],[1MG],[2MG],[M2G],[7MG],[OMG],[YG],[H2U],[5MU],[PSU]
>
> Please let me know if there are problems with this.

I would suggest to include all purine and pyrimidine derivates into this set as a long 
term target and think we need a real chemist to review the following lists.
I've looked in detail at Cysteine using
http://www.imb-jena.de/ImgLibPDB/pages/hetDir/hetDir.php3?hetDirTab=hetDir&field=name&name=cytosine
they all look like I expect pyrimidines should look (but I'm not a chemist)
1MC    1-METHYLCYTOSINE 1bky only the base without sugar
3MC    3-METHYLCYTOSINE 3MCT only the base without sugar
C66    2-AMINOETHYLLYSINE-CARBONYLMETHYLENE-CYTOSINE 1nr8 no sugar
CAR    CYTOSINE ARABINOSIDE 1nh3 with arabinose (ribose isomer)
CP1    2-(METHYLAMINO)-ETHYLGLYCINE-CARBONYLMETHYLENE- CYTOSINE 1QPY no sugar
CPN    2-AMINOETHYLGLYCINE-CARBONYLMETHYLENE-CYTOSINE 1nr8 no sugar
DFC    2'-DEOXY-L-RIBO-FURANOSYL CYTOSINE-5'-MONOPHOSPHATE 1r4d deoxy sugar
IMC    2'-DEOXY-5-METHYLISOCYTOSINE 1be5
MCN    PTERIN CYTOSINE DINUCLEOTIDE 1N62
PCD    (MOLYBDOPTERIN-CYTOSINE DINUCLEOTIDE-S,S)-DIOXO-AQUA-MOLYBDENUM(V) 1FFV

doing the same search for thymidine (but I don't look at detail into that)
group    name    formula    an PDB example
2DT 3'-DEOXYTHYMIDINE-5'-MONOPHOSPHATE C10 H15 N2 O7 P1 1qtm
5AT 5'-AMINO-5'-DEOXYTHYMIDINE 2(H15 C10 N3 O4) 1c95
5HT 5-HYDROXY-THYMIDINE C10 H16 N2 O6 1ehl
5IT 5-IODO-THYMIDINE-5'-PHOSPHATE C9 H12 N2 O8 I1 P1 1a6y
64T 5-HYDROXY-THYMIDINE-5'-MONOPHOSPHATE C10 H17 N2 O9 P1 1keg
6CT 6-ALPHA-METHYL CARBOCYCLIC THYMIDINE 2(C12 H18 N2 O6 P1) 1dau
ABT 3'-AZIDO-3'-DEOXY-THYMIDINE-5'-ALPHA BORANO TRIPHOSPHATE 2(C10 H17 B1 N5 O12 P3) 
1mn7
ADT N-ACETYL-DEOXYTHYMIDINE (SEE REMARK 7) 2(C12 H17 N3 O5) 8rsa
ATD THYMIDINE-3'-PHOSPHATE 2(C10 H15 N2 O8 P1) 1bx5
ATM 3'-AZIDO-3'-DEOXYTHYMIDINE-5'-MONOPHOSPHATE C10 H14 N5 O7 P1 1e98
ATY 3'-O-ACETYLTHYMIDINE-5'-DIPHOSPHATE C12 H18 N2 O12 P2 1dzt
AZD 3'-AZIDO-3'-DEOXYTHYMIDINE-5'-DIPHOSPHATE 3(C10 H15 N5 O10 P2) 1lwx
AZT 3'-AZIDO-3'-DEOXYTHYMIDINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 8ico
D4D 2',3'-DEHYDRO-2',3'-DEOXY-THYMIDINE 5'-DIPHOSPHATE C10 H13 N2 O10 P2 1f3f
D4T 2',3'-DEHYDRO-2',3'-DEOXY-THYMIDINE 5'-TRIPHOSPHATE 3(C10 H14 N2 O13 P3) 1f3f
DAU 2'DEOXY-THYMIDINE-5'-DIPHOSPHO-ALPHA-D-GLUCOSE 16(C16 H26 N2 O16 P2) 1g1l
DRT 2'-DEOXY-L-RIBO-FURANOSYL THYMIDINE-5'-MONOPHOSPHATE C10 H15 N2 O8 P1 1fv8
FDM 3'-FLUORO-3'-DEOXYTHYMIDINE MONOPHOSPHATE C10 H14 N2 O7 F1 P1 1nmx
MMT 5'-O-(DIMETHYLAMINO)-THYMIDINE H19 C12 N3 O5 1cx5
NYM 3'-DEOXY-3'-AMINOTHYMIDINE MONOPHOSPHATE C10 H16 N3 O7 P1 1nmz
PST P-THIOTHYMIDINE C10 H14 N2 O6 P1 S1 1krp
PTP DEOXYTHYMIDINE-3',5'-BISPHOSPHATE C10 H13 N2 O11 P2 1enc
SMT 2'-[(METHYLTHIO)ETHYLOXY]-THYMIDINE-5'-MONOPHOSPHATE 2(C13 H21 N2 O9 P1 S1) 1mlx
SPT 5'-THIO-THYMIDINE PHOSPHONIC ACID C10 H15 N2 O7 P1 S1 1k4s
T THYMIDINE-5'-MONOPHOSPHATE C10 H15 N2 O8 P1 1mw8
T2S THYMIDINE-5'-DITHIOPHOSPHORATE C10 H15 N2 O6 P1 S2 1k8l
T3P ALPHA-ANOMERIC THYMIDINE-3'-PHOSPHATE C10 H15 N2 O8 P1 1c2q
TBD 2*-DEOXY-THYMIDINE-5*-ALPHA BORANO DIPHOSPHATE (ISOMER RP) 3(C10 H19 N2 O10 P2 B1 
-1) 1f6t
TCP 5'-METHYLTHYMIDINE C11 H16 N2 O5 1ac3
TDX THYMIDINE-5'-DIPHOSPHO-BETA-D-XYLOSE 2(C15 H24 N2 O15 P2) 1kep
THM THYMIDINE C10 H14 N2 O5 1e2j
THP THYMIDINE-3',5'-DIPHOSPHATE C10 H16 N2 O11 P2 1a2t
THS THYMIDINE-5'-(DITHIO)PHOSPHATE 3(C10 H15 N2 O6 P1 S2) 1ak0
TMP THYMIDINE-5'-PHOSPHATE 2(C10 H15 N2 O8 P1) 1cy1
TPE 3'-O-ACETYLTHYMIDINE-5'-(DIPHOSPHATE PHENYL ESTER) C18 H23 N2 O12 P2 1dzt
TRH 2'-DEOXY-THYMIDINE-BETA-L-RHAMNOSE 8(C16 H26 N2 O15 P2) 1g3l
TSP 3'-THIO-THYMIDINE-5'-PHOSPHATE C10 H15 N2 O7 P1 S1 1ac3
TTP THYMIDINE-5'-TRIPHOSPHATE C10 H17 N2 O14 P3 1cr1
TYD THYMIDINE-5'- DIPHOSPHATE C10 H16 N2 O11 P2 1cr4

for uracil I got
612 6-CYCLOHEXYLTHIO-1-ETHOXYMETHYL-5-ISOPROPYLURACIL C16 H20 N2 O3 S1 1c1c
AHU 1',5'-ANHYDRO-2',3'-DIDEOXY-2'-(5-IODOURACIL-1-YL)- D-ARABINO-HEXITOL 2(C10 H13 N2 
O5 I1) 1ki6
GCA 6-(3',5'-DIMETHYLBENZYL)-1-ETHOXYMETHYL-5- ISOPROPYLURACIL C19 H26 N2 O3 1c1b
HMU 5-HYDROXYMETHYL URACIL 2(C5 H6 N2 O3) 1oe6
IUR 5-IODOURACIL 4(C4 H3 N2 O2 I1) 1gte
MKC 6-BENZYL-1-ETHOXYMETHYL-5-ISOPROPYL URACIL C17 H22 N2 O3 1rt1
PFA [4-(4-HYDROXY-3-ISOPROPYL-PHENOXY)-3,5-DIMETHYL- PHENYL]-6-AZAURACIL 2(C20 H21 N3 
O4) 1n46
SUR 1-(BETA-D-RIBOFURANOSYL)-2-THIO-URACIL-5'- PHOSPHATE 4(C9 H13 N2 O8 P1 S1) 1hdw
TNK 6-BENZYL-1-BENZYLOXYMETHYL-5-ISOPROPYL URACIL C22 H24 N2 O3 1jla
UAA URACIL-6-ACETIC ACID 4(C6 H6 N2 O4) 1gt8
UAR URACIL ARABINOSE-5'-PHOSPHATE C9 H13 N2 O9 P1 1ho6
URA URACIL 4(C4 H4 N2 O2) 1bd4
URF 5-FLUOROURACIL 4(C4 H3 N2 O2 F1) 1h7x


additional search for pyrimidine
141 PYRAZOLO[3,4-D]PYRIMIDINE-4,6-DIONE 4(C5 H2 N4 O2) 1jrp
7HP 7-HYDROXY-PYRAZOLO[4,3-D]PYRIMIDINE 2(C5 H4 N4 O1) 1i0i
BBH 1-BENZYL-3-(4-METHOXY-BENZENESULFONYL)-6-OXO- HEXAHYDRO-PYRIMIDINE-4-CARBOXYLIC 
ACID HYDROXYAMIDE C19 H21 N3 O6 S1 1d8m
BBT 2-HYDROXY-5-[4-(2-HYDROXY-ETHYL)-PIPERIDIN-1-YL]-5- PHENYL-1H-PYRIMIDINE-4,6-DIONE 
C17 H21 N3 O4 1jj9
CCV 6-[3-HYDROXY-2-(HYDROXYMETHYL)PROPYL]-5-METHYL- 2,4(1H,3H)-PYRIMIDINEDIONE 2(C9 
H14 N2 O4) 1e2p
COE FURO[2,3D]PYRIMIDINE ANTIFOLATE C20 H22 N6 O6 1daj
COQ 2,4-DIAMINO-6-[N-(3',5'-DIMETHOXYBENZYL)-N- METHYLAMINO]PYRIDO[2,3-D]PYRIMIDINE 
C17 H20 N6 O2 1ly4
CP6 5-(4-CHLORO-PHENYL)-6-ETHYL-PYRIMIDINE-2,4-DIAMINE 2(C12 H13 N4 CL1) 1j3j
DDP 2,4-DIAMINO-4,6-DIHYDROXYPYRIMIDINE C4 H6 N4 O2 1il5
DTM 2,4-DIAMINO-6-[N-(3',4',5'-TRIMETHOXYBENZYL)-N- 
METHYLAMINO]PYRIDO[2,3-D]PYRIMIDINE C18 H22 N6 O3 1mvs
DUC DIHYDROPYRIMIDINE-2,4(1H,3H)-DIONE 2(C4 H6 N2 O2) 1uaq
FQP 4-AMINO-2-TRIFLUOROMETHYL-5-HYDROXYMETHYLPYRIMIDINE PYROPHOSPHATE 2(C6 H8 N3 O7 F3 
P2) 1g4p
HMH 4-AMINO-5-HYDROXYMETHYL-2-METHYLPYRIMIDINE 2(C6 H9 N3 O1) 1jxi
HQQ 5-METHYL-5-(4-PHENOXY-PHENYL)-PYRIMIDINE-2,4,6-TRIONE 3(C17 H14 N2 O4) 1g4k
IDH (5S)-5-IODODIHYDRO-2,4(1H,3H)- PYRIMIDINEDIONE 2(C4 H5 N2 O2 I1) 1gth
INI 5-NITRO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE 30(C9 H14 N4 O8) 1rvv
LIH 6-([5-QUINOLYLAMINO]METHYL)-2,4-DIAMINO-5- METHYLPYRIDO[2,3-D]PYRIMIDINE C18 H17 
N7 1kms
LII (Z)-6-(2-[2,5-DIMETHOXYPHENYL]ETHEN-1-YL)-2,4-DIAMINO- 
5-METHYLPYRIDO[2,3-D]PYRIMIDINE C18 H19 N5 O2 1kmv
LMZ 5-NITROSO-6-RIBITYL-AMINO-2,4(1H,3H)-PYRIMIDINEDIONE 20(C9 H14 N4 O7) 1c2y
NW1 6-CYCLOHEXYLMETHYLOXY-5-NITROSO-PYRIMIDINE-2, 4-DIAMINE C11 H17 N5 O2 1e1x
PQ0 2-AMINO-4-OXO-4,7-DIHYDRO-3H-PYRROLO[2,3-D]PYRIMIDINE- 5-CARBONITRILE C7 H5 N5 O1 
1it8
PRD N6-(2,5-DIMETHOXY-BENZYL)-N6-METHYL-PYRIDO[2,3- D]PYRIMIDINE-2,4,6-TRIAMINE C17 
H20 N6 O2 1boz
RCA 6-{[4-(HYDROXYMETHYL)-5-METHYL-2,6-DIOXOHEXAHYDROPYRIMIDIN-5-YL] 
METHYL}-5-METHYLPYRIMIDINE-2,4(1H,3H)-DIONE C12 N4 O5 H16 0 1e2n
TMC 1-[4-HYDROXY-5-(HYDROXYMETHYL)BICYCLO[3.1.0] 
HEX-2-YL]-5-METHYLPYRIMIDINE-2,4(1H,3H)- DIONE 2(C12 H16 N2 O4) 1e2k


for adenosine
101 2'-DEOXY-ADENOSINE 3'-MONOPHOSPHATE C10 H14 N5 O6 P1 1cs4
103 2',5'-DIDEOXY-ADENOSINE 3'-MONOPHOSPHATE C10 H14 N5 O5 P1 1cul
12A 2-METHYLTHIO-N6-(AMINOCARBONYL-L-THREONYL)-ADENOSINE- 5'-MONOPHOSPHATE C16 H26 N5 
O7 P1 S1 1fir
139 ADENOSINE-5'-[TRIHYDROGEN DIPHOSPHATE] P'-3'-ESTER WITH 2'-DEOXYURIDINE C19 H25 N7 
O14 P2 1jn4
1DA 1-DEAZA-ADENOSINE C11 H14 N4 O4 1add
1MA 6-HYDRO-1-METHYLADENOSINE-5'-MONOPHOSPHATE 2(C11 H18 N5 O7 P1) 1c2w
2AD 2-AMINO-ADENOSINE C10 H14 N6 O3 1obc
2DA 2',3'-DIDEOXYADENOSINE-5'-MONOPHOSPHATE C10 H14 N5 O5 P1 1qsy
2MA 2-METHYLADENOSINE-5'-MONOPHOSPHATE 2(C11 H16 N5 O7 P1) 1efw
3AD 3'-DEOXYADENOSINE 2(C10 H13 N5 O3) 1fa0
3AN 3'-DEOXY 3'-AMINO ADENOSINE-5'-DIPHOSPHATE 3(C10 H16 N6 O9 P2) 1hiy
3AT 3'-DEOXYADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O12 P3 1f5a
5AD 5'-DEOXYADENOSINE 2(C10 H13 N5 O3) 4req
5CA 5'-O-(N-(L-CYSTEINYL)-SULFAMOYL)ADENOSINE C13 H19 N7 O7 S2 1nj1
8BR 8-BROMO-ADENOSINE-5'-MONOPHOSPHATE C10 H13 N5 O7 BR1 P1 5rhn
A ADENOSINE-5'-MONOPHOSPHATE 8(C10 H14 N5 O7 P1) 1cvj
A23 ADENOSINE-5'-PHOSPHATE-2',3'-CYCLIC PHOSPHATE C10 H13 N5 O9 P2 1d4r
A2P ADENOSINE-2',5'-DIPHOSPHATE C10 H15 N5 O10 P2 1fnc
A3P ADENOSINE-3'-5'-DIPHOSPHATE 2(C10 H15 N5 O10 P2) 1aqu
A4P 6-(ADENOSINE TETRAPHOSPHATE-METHYL)-7,8-DIHYDROPTERIN C17 H24 N10 O17 P4 1ex8
A5A '5'-O-(N-(L-ALANYL)-SULFAMOYL)ADENOSINE C13 H19 N7 O7 S1 1nj6
AAM ALPHA-ADENOSINE MONOPHOSPHATE C10 H14 N5 O7 P1 1jha
ABM METHYL PHOSPHONIC ACID ADENOSINE ESTER 2(C11 H16 N5 O6 P1) 1dku
ABP 8-BROMOADENOSINE-5'-DIPHOSPHATE C10 H14 N5 O10 BR1 P2 1mxc
ABR (R)-(N-PHENYL-2-HYDROXY-ETHYL)-2'-DEOXY-ADENOSINE-5'- MONOPHOSPHATE H22 C18 N5 O7 
P1 1k5e
ABS (S)-(N-PHENYL-2-HYDROXY-ETHYL)-2'-DEOXY-ADENOSINE-5'- MONOPHOSPHATE H22 C18 N5 O7 
P1 1k5f
ACO COBALAMIN-ADENOSINE COMPLEX C72 H100 N18 O17 CO1 P1 3req
AD2 2'-DEOXY-ADENOSINE-3'-5'-DIPHOSPHATE C10 H15 N5 O9 P2 1l2b
AD3 3-DEAZA-ADENOSINE 2(C11 H14 N4 O4) 1hp0
ADI 2',3'-DIDEOXYADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O8 P2 1jx4
ADN ADENOSINE 2(C10 H13 N5 O4) 1bx4
ADP ADENOSINE-5'-DIPHOSPHATE 4(C10 H15 N5 O10 P2) 13pk
ADQ ADENOSINE-5'-DIPHOSPHATE-GLUCOSE 10(C16 H25 N5 O15 P2) 1eq2
ADS ADENOSINE-5'-(DITHIO)PHOSPHATE C10 H14 N5 O5 P1 S2 1ak0
ADW ADENOSINE-5'-DITUNGSTATE C10 H15 N5 O10 W2 1kpe
ADX ADENOSINE-5'-PHOSPHOSULFATE 2(C10 H14 N5 O10 P1 S1) 1g8g
ADY 3'-OXO-ADENOSINE 4(C10 H11 N5 O4) 1ky5
AMO ASPARTYL-ADENOSINE-5'-MONOPHOSPHATE C14 H19 N6 O10 P1 1c0a
AMP ADENOSINE MONOPHOSPHATE 2(C10 H14 N5 O7 P1) 12as
AMW ADENOSINE MONOTUNGSTATE C10 H14 N5 O7 W1 6fit
AP2 ADENOSINE ALPHA,BETA-METHYLENE DIPHOSPHATE C11 H17 N5 O9 P2 1av5
AP5 PA,PE-BIS(ADENOSINE-5'-)PENTAPHOSPHATE 2(C20 H34 N10 O22 P5) 1ake
APM 2'-DEOXYADENOSINE-5'- MONOPHOSPHATE 5(C10 H14 N5 O6 P1) 1lgn
APR ADENOSINE-5-DIPHOSPHORIBOSE 2(C15 H23 N5 O14 P2) 1g9q
APX 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHORIBOSE 4(C15 H24 N5 O17 P3) 1qmg
AS ADENOSINE-5'-THIO-MONOPHOSPHATE C10 H14 N5 O5 P1 S1 8psh
ATA GAMMA-ARSONO-BETA, GAMMA-METHYLENEADENOSINE-5'- DIPHOSPHATE 2(C11 H19 N5 O12 AS1 
P2) 1glj
ATF ADENOSINE-5'-(BETA,GAMMA-DIFLUROROMETHYLENE) TRIPHOSPHATE 2(C11 H16 N5 O12 F2 P3) 
1bwf
ATG ADENOSINE 5'-O-(-3-THIOTRIPHOSPHATE) C10 H16 N5 O12 P3 S1 1bif
ATP ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 1a0i
ATR 2'-MONOPHOSPHOADENOSINE-5'-DIPHOSPHATE 2(C10 H16 N5 O13 P3) 1afl
AV2 ADENOSINE-5'-DIPHOSPHATE-2',3'-VANADATE 2(C10 H13 N5 O12 P2 V1) 1m7g
AVC ADENOSINE-5'-MONOPHOSPHATE-2',3'-VANADATE 2(C10 H12 N5 O9 P1 V1) 1m5o
BIS (1,1,5,5-TETRAFLUORO-5-PHOSPHATE-PENTANE) ADENOSINE DIPHOSPHATE C15 H22 N5 O12 F4 
P3 16pk
CDY 2-CHLORODIDEOXYADENOSINE C10 H12 N5 O2 CL1 1qye
CMP ADENOSINE-3',5'-CYCLIC-MONOPHOSPHATE 2(C10 H12 N5 O6 P1) 1cx4
DAD 2',3'-DIDEOXYADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O11 P3 1cjt
DAT 2'-DEOXYADENOSINE-5'-DIPHOSPHATE 2(C10 H15 N5 O9 P2) 1g4a
DOT 3'ANTHRANILOYL-2'-DEOXY-ADENOSINE-5'-TRIPHOSPHATE 2(C17 H21 N6 O13 P3) 1lvc
DTP 2'-DEOXYADENOSINE 5'-TRIPHOSPHATE C10 H12 N5 O12 P3 ---- 1bpe
E 2'-DEOXY-N6-((-)-(7S,8R,9S,10R)[10-97,8,9,10-TETRA HYDROBENZO[A]PYRENYL]) ADENOSINE 
MONOPHOSPHATE C30 H28 N5 O9 P1 1agu
FA5 ADENOSINE-5'-[PHENYLALANINYL-PHOSPHATE] C19 H23 N6 O8 P1 1jjc
FYA PHENYLALANINYL-ADENOSINE-5'-PHOSPHATE C19 H25 N6 O7 P1 1b7y
GAP GLYCYL-ADENOSINE-5'-PHOSPHATE 2(C12 H17 N6 O8 P1) 1ggm
GTA P1-7-METHYLGUANOSINE-P3-ADENOSINE-5',5'-TRIPHOSPHATE C21 H30 N10 O17 P3 1+ 1ipb
HAM HISTIDYL-ADENOSINE MONOPHOSPHATE 4(C16 H21 N8 O8 P1) 1ady
HYC O5'-[9-(3,17B-DIHYDROXY-1,3,5(10)-ESTRATRIEN-16B-YL)- NONANOYL]ADENOSINE C37 H51 
N5 O7 1i5r
IB2 P1-P2-METHYLENE-P3-THIO-DIADENOSINE TRIPHOSPHATE C21 H29 N10 O14 P3 S1 1fhi
IOT ARGININE-N-METHYLCARBONYL PHOSPHORIC ACID 5'- ADENOSINE ESTER 2(C18 H28 N9 O10 P1) 
1mbz
LAD ADENOSINE-5'-[LYSYL-PHOSPHATE] C16 H26 N7 O8 P1 1e1t
MA6 6N-DIMETHYLADENOSINE-5'-MONOPHOSHATE 2(C12 H17 N5 O6 P1) 1wts
MAD 6-HYDRO-1-METHYLADENOSINE-5'-MONOPHOSPHATE C11 H16 N5 O7 P1 1h3e
MAO 5'-DEOXY-5'-[N-METHYL-N-(2-AMINOOXYETHYL) AMINO]ADENOSINE C13 H21 N7 O4 1i72
MHZ 5'-DEOXY-5'-[(3-HYDRAZINOPROPYL)METHYLAMINO]ADENOSINE C14 H24 N8 O3 1i79
MIA 2-METHYLTHIO-N6-ISOPENTENYL-ADENOSINE-5'-MONOPHOSPHATE C16 H26 N5 O7 P1 S1 1b23
MNT 2'(3')-O-N-METHYLANTHRANILOYL-ADENOSINE-5'-DIPHOSPHATE C18 H21 N6 O10 P2 1lvk
MTA 5'-DEOXY-5'-METHYLTHIOADENOSINE C11 H15 N5 O3 S1 1cg6
NBS N6-BENZYL ADENOSINE-5'-DIPHOSPHATE C17 H21 N5 O10 P2 1ksw
NDE ADENOSINE 5'-(TRIHYDROGEN DIPHOSPHATE) P'-5'-ESTER WITH 
3-(AMINOCARBONYL)-4-(1-HYDROXYL-2-OXO-3- 
PHOSPHONOOXY-PROPYL)-1-BETA-D-RIBOFURANOSYLPYRIDINIUM INNER SALT 2(C24 H32 N7 O20 P3) 
1n1e
NEA 5'-DEOXY-5'-[2-(AMINO)ETHYLTHIO]ADENOSINE 2(C12 H18 N6 O3 S1) 1g38
NEC N-ETHYL-5'-CARBOXAMIDO ADENOSINE C12 H16 N6 O4 1mmh
NMD N-NAPHTHALEN-1-YLMETHYL-2'-[3,5-DIMETHOXYBENZAMIDO]- 2'-DEOXY-ADENOSINE 6(C30 H30 
N6 O6) 1i32
OAD 2'-O-ACETYL ADENOSINE-5-DIPHOSPHORIBOSE 2(C17 H25 N5 O15 P2) 1m2n
P5A '5'-O-(N-(L-PROLYL)-SULFAMOYL)ADENOSINE C15 H21 N7 O7 S1 1nj5
PAP 3'-PHOSPHATE-ADENOSINE-5'-DIPHOSPHATE 2(C10 H16 N5 O13 P3) 1afk
PPS 3' PHOSPHATE-ADENOSINE -5' PHOSPHATE SULFATE 3(C10 H15 N5 O13 P2 S1) 1bux
PRX ADENOSINE-5'-MONOPHOSPHATE-PROPYL ESTER 2(C13 H20 N5 O7 P1) 1pg3
PSD 5'-O-[N-(PROLYL)-SULFAMOYL]ADENOSINE 2(C15 H21 N7 O7 P1) 1h4s
QSI 5'-O-[N-(L-GLUTAMINYL)-SULFAMOYL]ADENOSINE C15 H22 N8 O8 S1 1euq
R 2'-DEOXY-N6-(R)STYRENE OXIDE ADENOSINE MONOPHOSPHATE C18 H22 N5 O7 P1 1agk
RIA 2'-O-[(5'-PHOSPHO)RIBOSYL]ADENOSINE-5'- MONOPHOSPHATE C15 H22 N5 O14 P2 1yfg
RMP 2'-DEOXY-ADENOSINE-5'-RP-MONOMETHYLPHOSPHONATE 3(C11 H16 N5 O5 P1) 1k1h
SAP ADENOSINE-5'-DIPHOSPHATE MONOTHIOPHOSPHATE 2(C10 H16 N5 O12 P3 S1) 1aux
SMP 2'-DEOXY-ADENOSINE-5'-SP-MONOMETHYLPHOSPHONATE C11 H16 N5 O5 P1 1k1h
SRA ADENOSINE -5'-THIO-MONOPHOSPHATE 5(C10 H14 N5 O6 P1 S1) 1d0t
SSA 5'-O-(N-(L-SERYL)-SULFAMOYL)ADENOSINE 2(C13 H19 N7 O8 S1) 1fyf
STP 2'-DEOXYADENOSINE 5'-O-(1-THIOTRIPHOSPHATE) C10 H16 N5 O11 P3 S1 9ica
TND N-1,2,3,4-TETRAHYDRONAPHTH-1-YL-2'-[3,5- DIMETHOXYBENZAMIDO]-2'-DEOXY-ADENOSINE 
6(C29 H32 N6 O6) 1i33
TSB 5'-O-(N-(L-THREONYL)-SULFAMOYL)ADENOSINE 4(C14 H21 N7 O8 S1) 1evl
UP5 P1-(ADENOSINE-5'-P5-(URIDINE-5')PENTAPHOSPHATE C19 H28 N7 O24 P5 1uke
UPA URIDYLYL-2'-5'-PHOSPHO-ADENOSINE 2(C19 H24 N7 O12 P1) 11ba
Y 2'-DEOXY-N6-(S)STYRENE OXIDE ADENOSINE MONOPHOSPHATE C18 H22 N5 O7 P1 1ago

for guanosine
1MG 1N-METHYLGUANOSINE-5'-MONOPHOSPHATE C11 H16 N5 O8 P1 1f7u
2GP GUANOSINE-2'-MONOPHOSPHATE 2(C10 H14 N5 O8 P1) 1bir
2MG 2N-METHYLGUANOSINE-5'-MONOPHOSPHATE C11 H16 N5 O8 P1 1ehz
35G GUANOSINE-3',5'-MONOPHOSPHATE 6(C10 H12 N5 O7 P1) 1bhn
3GP GUANOSINE-3'-MONOPHOSPHATE C10 H14 N5 O8 P1 2gsp
5CG 5'-CHLORO-5'-DEOXY-GUANOSINE 2(C10 H12 N5 O4 CL1) 1m5p
5GP GUANOSINE-5'-MONOPHOSPHATE 2(C10 H14 N5 O8 P1) 1a97
7MG 7N-METHYL-8-HYDROGUANOSINE-5'-MONOPHOSPHATE 3(C11 H18 N5 O8 P1) 1c2w
8MG 8-METHYL-2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE 2(C11 H16 N5 O7 P1) 1r4d
8OG 8-OXO-2'-DEOXY-GUANOSINE-5'-MONOPHOSPHATE C10 H14 N5 O8 P1 1fyi
BGM 8-BROMO-2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE 8(C10 H13 N5 O7 P1 BR1) 1n7a
CAG P3-1-(2-NITROPHENYL)ETHYL-GUANOSINE C18 H25 N6 O16 P3 1plj
CPG CYTIDYLYL-2',5'-PHOSPHORYL GUANOSINE C10 H12 N5 O8 P1 1rnc
DBG GUANOSINE-5'-(PHOSPHORAMIDATE-N- [[DIHYDROXYPHOSPHANYL]-IMINE-N-METHANE]) C11 H20 
N7 O12 P3 1clu
DCG DEOXYCYTIDYLYL-3',5'-GUANOSINE C10 H12 N5 O7 P1 - 1rnd
DDG 2',3'-DIDEOXY-GUANOSINE-5'-MONOPHOSPHATE C10 H14 N5 O6 P1 1qss
DFG 2'-DEOXY-L-RIBO-FURANOSYL GUANOSINE-5'-MONOPHOSPHATE 2(C10 H14 N5 O7 P1) 1fv7
DG3 2'-3'DIDEOXYGUANOSINE-5'-TRIPHOSPHATE C10 H16 N5 O12 P3 1jxl
DGP 2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE 2(C10 H14 N5 O7 P1) 1dek
DGT 2'-DEOXYGUANOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 8icv
FAG 2'-DEOXY-N7-(8,9-DIHYDRO-8-(2,6-DIAMINO-4-OXO-3,4- 
DIHYDROPYRIMIDYL-5-FORMAMIDO)-9-(HYDROXY-AFLATOXINB1) GUANOSINE C27 H27 N5 O14 P1 1hm1
G GUANOSINE-5'-MONOPHOSPHATE C10 H14 N5 O8 P1 1g8m
G25 GUANOSINE-5'-MONOPHOSPHATE C10 H14 N5 O8 P1 1me0
G2S GUANOSINE-5'-DITHIOPHOSPHORATE 2(C10 H14 N5 O6 P1 S2) 1k8l
G3D GUANOSINE-3'-MONOPHOSPHATE-5'-DIPHOSPHATE C10 H16 N5 O14 P3 1mr3
G4P GUANOSINE-5',3'-TETRAPHOSPHATE C10 H17 N5 O17 P4 1lnz
G7M N7-METHYL-GUANOSINE-5'-MONOPHOSPHATE C11 H17 N5 O8 P1 1+ 1c0a
GDP GUANOSINE-5'-DIPHOSPHATE 3(C10 H15 N5 O11 P2) 1a2k
GDR GUANOSINE-5'-DIPHOSPHATE-RHAMNOSE 3(C16 H25 N5 O15 P2) 1n7g
GDX GUANOSINE 5'-(TRIHYDROGEN DIPHOSPHATE), P'-D- MANNOPYRANOSYL ESTER 4(C16 H23 N5 
O17 P2) 1mfz
GH3 3'-DEOXY-GUANOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 1n1h
GMP GUANOSINE C10 H13 N5 O5 1ih7
GMS 2'-DEOXYGUANOSINE-5'-MONOSELENOPHOSPHATE 2(C10 H14 N5 O6 P1 SE1) 1n6s
GN7 N7-GUANOSINE-5'-MONOPHOSPHATE C10 H14 N5 O7 P1 1gn7
GNG 2'-DEOXY-GUANOSINE C10 H13 N5 O4 1nh3
GP3 DIGUANOSINE-5'-TRIPHOSPHATE C20 H27 N10 O18 P3 1cko
GPG GUANYLYL-2(PRIME),5(PRIME)-GUANOSINE C20 H24 N10 O12 P1 2rnt
GPL LYSINE GUANOSINE-5'-MONOPHOSPHATE C16 H26 N7 O9 P1 1ckn
GPX GUANOSINE 5'-DIPHOSPHATE 2':3'-CYCLIC MONOPHOSPHATE C10 H14 N5 O13 P3 1ch8
GS GUANOSINE-5'-THIO-MONOPHOSPHATE 3(C10 H14 N5 O6 P1 S1) 8psh
GSP GUANOSINE DIPHOSPHATE MONOTHIOPHOSPHATE C10 H16 N5 O13 P3 S1 1a2b
GSR 2'-DEOXY-N2-(R)STYRENE OXIDE GUANOSINE MONOPHOSPHATE C18 H22 N5 O8 P1 1af1
GSS 2'-DEOXY-N2-(S)STYRENE OXIDE GUANOSINE MONOPHOSPHATE C18 H22 N5 O8 P1 1ap1
GTA P1-7-METHYLGUANOSINE-P3-ADENOSINE-5',5'-TRIPHOSPHATE C21 H30 N10 O17 P3 1+ 1ipb
GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE C21 H30 N10 O18 P3 +1 1mwh
GTP GUANOSINE-5'-TRIPHOSPHATE 15(C10 H16 N5 O14 P3) 1a8r
IG ISOGUANOSINE-5'-MONOPHOSPHATE 2(C10 H14 N5 O8 P1) 1g3a
LGP LINEAR DECARBON-C2* GUANOSINE-5'-MONOPHOSPHATE C9 H14 N5 O7 P1 1ac9
M2G N2-DIMETHYLGUANOSINE-5'-MONOPHOSPHATE C12 H18 N5 O8 P1 1ehz
M7G 7N-METHYL-8-HYDROGUANOSINE-5'-DIPHOSPHATE C11 H19 N5 O11 P2 1ap8
MDG 7N-METHYL-8-HYDROGUANOSINE-5'-DIPHOSPHATE C11 H19 N5 O11 P2 1jtf
MG7 7-METHYLGUANOSINE C11 H16 N5 O5 1eqa
MGD MOLYBDOPTERIN GUANOSINE DINUCLEOTIDE 2(C20 H24 N10 O13 P2 S2) 1aa6
MGP 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE C11 H19 N5 O14 P3 1+ 1ipc
MGT 7N-METHYL-8-HYDROGUANOSINE-5'-TRIPHOSPHATE C11 H20 N5 O14 P3 1av6
MRG N2-(3-MERCAPTOPROPYL)-2'-DEOXYGUANOSINE-5'- MONOPHOSPHATE C13 H20 N5 O7 P1 S1 1n6q
OMG O2'-METHYLGUANOSINE-5'-MONOPHOSPHATE C11 H16 N5 O8 P1 1ehz
P 2'-DEOXY-N1,N2-PROPANO GUANOSINE MONOPHOSPHATE C13 H18 N5 O7 P1 1ag3
PCG CYCLIC GUANOSINE MONOPHOSPHATE 3(C10 H12 N5 O7 P1) 1be4
PGD GUANOSINE-5'-DIPHOSPHATE PTERIN MOIETY OF MOLYBDOPTERIN GUANOSINE DINUCLEOTIDE 
2(C20 H24 N10 O13 P2 S2) 1dmr
PGN 2'-DEOXYGUANOSINE-3',5'-DIPHOSPHATE C10 H15 N5 O10 P2 1j9n
PGP GUANOSINE-3',5'-DIPHOSPHATE C10 H15 N5 O11 P2 1duh
PGS 2-DEAZO-6-THIOPHOSPHATE GUANOSINE-5'-MONOPHOSPHATE C10 H15 N4 O10 P2 S1 1ksz
QUO 2-AMINO-7-DEAZA-(2'',3''-DIHYDROXY-CYCLOPENTYLAMINO)- GUANOSINE-5'-MONOPHOSPHATE 
C17 H26 N5 O10 P1 1c0a
S6G 6-THIO-2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE C10 H14 N5 O6 P1 S1 1kb1
SGP GUANOSINE-2',3'-CYCLOPHOSPHOROTHIOATE C10 H12 N5 O6 P1 S1 1gsp
SPG 2-DEAMINO-6-DEOXY-6THIOPHOSPHITE-5'-PHOSPHATE GUANOSINE C10 H15 N4 O10 P2 S1 1nht
TGP 5'-THIO-2'-DEOXY-GUANOSINE PHOSPHONIC ACID C10 H14 N5 O6 P1 S1 1k4t
U2G URIDYLYL-2'-5'-PHOSPHO-GUANOSINE 4(C19 H24 N7 O13 P1) 11bg
X 2'-DEOXY-N7-(8,9-DIHYDRO-9-HYDROXY-AFLATOXIN) GUANOSINE MONOPHOSPHATE C27 H27 N5 O14 
P1 1ag5

for inosine
9DI 9-DEAZAINOSINE C11 H13 N3 O5 1a9p
IDP INOSINE-5'-DIPHOSPHATE C10 H14 N4 O11 P2 1mrd
IMO 6-PHOSPHORYL INOSINE MONOPHOSPHATE C10 H9 N4 O11 P2 2- 1cg0
IMP INOSINE MONOPHOSPHATE 4(C10 H13 N4 O8 P1) 1abb
NOS INOSINE C10 H12 N4 O5 1a9s
OIP 2'-DEOXYINOSINE-5'-DIPHOSPHATE C10 H13 N4 O7 P1 1mrf

aditional search for purine
1AP 2,6-DIAMINOPURINE NUCLEOTIDE C10 H15 N6 O6 P1 1zay
207 1-AMINO-6-CYCLOHEX-3-ENYLMETHYLOXYPURINE C13 H18 N4 O1 1h0w
2A6 2-ANILINO-6-CYCLOHEXYLMETHOXYPURINE 2(C18 H21 N5 O1) 1h1q
2SA 2-[9-(3,4-DIHYDROXY-5-PHOSPHONOOXYMETHYL-TETRAHYDRO- 
FURAN-2-YL)-9H-PURIN-6-YLAMINO]-SUCCINIC ACID C14 N5 O11 P1 H18 1mez
39A 6-AMINO-3,9-DIMETHYL-9H-PURIN-3-IUM 2(C7 H10 N5 1+) 1pu7
3MA 6-AMINO-3-METHYLPURINE C6 H8 N5 3mag
4SP O6-CYCLOHEXYLMETHOXY-2-(4'-SULPHAMOYLANILINO) PURINE 2(C18 H22 N6 O3 S1) 1h1s
6CP 6-CYCLOHEXYLMETHOXY-2-(3'-CHLOROANILINO) PURINE 2(C18 H23 N5 O1 CL1) 1h1r
6MP 6-METHYLPURINE C6 H6 N4 2pua
7RA 7-ALPHA-D-RIBOFURANOSYL-2-AMINOPURINE-5'-PHOSPHATE C10 H14 N5 O7 P1 1l5m
7RP 7-ALPHA-D-RIBOFURANOSYL-PURINE-5'-PHOSPHATE C10 H13 N4 O7 P1 1l5l
9PP 2,6-DIAMINO-(S)-9-[2-(PHOSPHONOMETHOXY)PROPYL]PURINE 6(C9 N6 O4 P1 H13 2-) 1lv8
AAD (2-AMINOOXY-ETHYL)-[5-(6-AMINO-PURIN-9-YL)-3,4- 
DIHYDROXY-TETRAHYDRO-FURAN-2-YLMETHYL]-METHYL- SULFONIUM C13 H21 N6 O4 S1 1+ 1m4n
ADZ 9-METHYL-9H-PURIN-6-AMINE C6 H7 N5 1o9u
AET N-[N-(9-B-D-RIBOFURANOSYLPURIN-6-YL) METHYLCARBAMOYL]THREONINE-5'-MONOPHOSPHATE 
C16 H23 N6 O11 P1 1qf6
BCP 2-BROMO-6-CHLORO-PURINE C5 H2 N4 CL1 BR1 1m66
BOA 2-BROMO-6-HYDROXY-PURINE C5 H3 N4 O1 BR1 1m67
CFP 6-CHLORO-2-FLUOROPURINE C5 H2 N4 CL1 F1 1jdj
CL4 N-{3-[5-(6-AMINO-PURIN-9-YL)-3,4-DIHYDROXY-TETRAHYDRO- 
FURAN-2-YL]-ALLYL}-2,3-DIHYDROXY-5-NITRO-BENZAMIDE C19 H19 N7 O8 1jr4
CPR 6-CHLOROPURINE RIBOSIDE, 5'-MONOPHOSPHATE 2(C10 H13 N4 O7 P1 CL1) 1b3o
EA1 3H-IMIDAZO[2,1-I]PURINE 2(C7 H5 N5) 1pu8
FTB N-{4-[1-(2-FLUOROBENZYL)-3-BUTYL-2,6-DIOXO-2,3,6,7- 
TETRAHYDRO-1H-PURIN-8-YLMETHYL]-PHENYL}-ACETAMIDE C25 H26 N5 O3 F1 1nhx
GMC (2R,3R,4S,5S)-4-AMINO-2-[6-(DIMETHYLAMINO)- 
9H-PURIN-9-YL]-5-(HYDROXYMETHYL)TETRAHYDRO-3- FURANOL C12 H18 N6 O3 1gpj
GU7 2-AMINO-7-[2-(2-HYDROXY-1-HYDROXYMETHYL-ETHYLAMINO)- 
ETHYL]-1,7-DIHYDRO-PURIN-6-ONE C10 H16 N6 O3 1fxu
HPR 6-HYDROXY-7,8-DIHYDRO PURINE NUCLEOSIDE C10 H14 N4 O5 1uio
I17 2-[TRANS-(4-AMINOCYCLOHEXYL)AMINO]-6-(BENZYL-AMINO)-9- CYCLOPENTYLPURINE C23 H31 
N7 1g5s
LMS [(2R,3S,4R,5R)-5-(6-AMINO-9H-PURIN-9-YL)-3,4- DIHYDROXYTETRAHYDRO-2-FURANYL]METHYL 
SULFAMATE C10 H14 N6 O6 S1 1h3n
M1A 6-AMINO-1-METHYLPURINE C6 H8 N5 1b42
M1G 3-(2-DEOXY-BETA-D-RIBOFURANOSYL)-PYRIDO[5,6-A]-PURINE- 10-ONE-5'-MONOPHOSPHATE C13 
H14 N5 O7 P1 1k29
MBP 1-[(2-AMINO-6,9-DIHYDRO-1H-PURIN-6-YL)OXY]-3- METHYL-2-BUTANOL C10 H13 N5 O2 1gz8
NOC 3-(6-AMINO-PURIN-9-YL)-5-HYDROXYMETHYL-CYCLOPENTANE-1, 2-DIOL C11 H15 N5 O3 1li4
NRT 6-(TETRAHYDRO-2-FURANYLMETHOXY)-9H-PURIN-2- AMINE C10 H13 N5 O2 1h0u
P2P N7-(5'-PHOSPHO-ALPHA-RIBOSYL)-2-HYDROXYPURINE C10 H13 N4 O8 P1 1jhr
P5P PURINE RIBOSIDE-5'-MONOPHOSPHATE C10 H13 N4 O7 P1 1rbn
PPZ 2-(PYRIDO[1,2-E]PURIN-4-YL)AMINO-ETHANOL 2(C11 H11 N5 O1) 1i5v
PRH 6-HYDROXY-1,6-DIHYDRO PURINE NUCLEOSIDE 4(C10 H15 N4 O5) 1a4m
PRN PURINE 2'-DEOXYRIBO-5'-MONOPHOSPHATE C10 H13 N4 O6 P1 1cl8
PUR PURINE RIBOSIDE C10 H13 N4 O4 1fkw
T6A N-[N-(9-B-D-RIBOFURANOSYLPURIN-6-YL) CARBAMOYL]THREONINE-5'-MONOPHOSPHATE C15 H21 
N6 O11 P1 1feq
TSX N-[4-(1-ALLYL-3-BUTYL-2,6-DIOXO-2,3,6,7-TETRAHYDRO-1H- 
PURIN-8-YLMETHYL)-PHENYL]-ACETAMIDE C21 H25 N5 O3 1m51
UN4 5-{[(2-AMINO-9H-PURIN-6-YL)OXY]METHYL}-2- PYRROLIDINONE C10 H12 N6 O2 1h0v

may be, it is easier for all "non standard" nucleic acids to parse the HETNAM record 
just as I did and determine dynamically whether there is an additional group to add to 
the sets

          nucleic
purine      pyrimidine
T U C           A I G

Just a low priority remark.
Regards, Jan

--
Snail to:Jan Reichert, IMB, D-07708 Jena, POB 100813.
Voice:+49 3641 6562-05 (Fax:+49 3641 6562-10)   :/i
mailto:[EMAIL PROTECTED]





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