Hi,

I didn't follow this thread - but the smiles seem to be ok (actually, as 
long as the rings are closed sensible the smiles don't need enumeration):

In [6]: mol = 
Chem.MolFromSmiles('Fc1ccccc1N1N=C(CC1c1ccccc1Cl)c1ccc(Br)cc1')

In [7]: Chem.MolToSmiles(mol)
Out[7]: 'Fc1ccccc1N1N=C(c2ccc(Br)cc2)CC1c1c(Cl)cccc1'

and if I run the MolWt calculator I do get sensible results.

In [9]: AvailDescriptors.descDict['MolWt'](mol)
Out[9]: 429.72000000000008

Bouille - could you run the same as above for your database molecules and 
highlight the outcome - maybe you could first assign the db call to a 
string variable and use that - I guess there is still something wrong in 
your strings ...

Cheers
nik




Adrian Schreyer <[email protected]> 
11/19/2009 12:50 PM

To
[email protected]
cc
[email protected]
Subject
Re: [Rdkit-discuss] Thank you to clarify






The SMILES strings are not correct, rings should be enumerated. In the 
first string for example, all four rings are labelled with '1' but it 
should look like this: c1ccc(c(c1)C2CC(=NN2c3ccccc3F)c4ccc(cc4)Br)Cl. That 
is why RDKit is throwing an error. Which software did you use to create 
the SMILES strings?

Adrian

On Thu, Nov 19, 2009 at 11:48, bouille <[email protected]> wrote:
Dear Greg

Thank you Adrian Schreyer for his quick answer

now I have the following error on some structures
rdkit.Chem.rdMolDescriptors._CalcMolWt(NoneType)
did not match C++ signature:
   _CalcMolWt(RDKit::ROMol mol, bool onlyHeavy=False)

I have written
AvailDescriptors.descDict['MolWt'](mol,onlyHeavy=False) to repair ???

Is it not clear ?

I read other alternative to handle heavy structure

 print 'embed: ',i
      AllChem.EmbedMolecule(mol)
      print 'optimize: ',i
      AllChem.UFFOptimizeMolecule(mol)
      mols.append(mol)

As example 3 compounds with difficulties why ?

bad molecule Fc1ccccc1N1N=C(CC1c1ccccc1Cl)c1ccc(Br)cc1 |c:9|
bad molecule NC1=C(C#N)C2=CCCCC2C2(C(=O)Nc3ccccc23)C1(C#N)C#N |c:1,t:5|
bad molecule
CCOC(=O)C1=C(C)N(c2ccc(OC)cc2)C(C)=C(C1c1ccc(Cl)cc1)C(=O)OCC |c:5,19|

Thank you to clarify

Best Regards
Bouille


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