Yes, that's right. But you need to use what I just released, 14.15.2. Note
that the version of OPSIN used at NCI cannot handle that 4R designation:
$ load "$(4R,2Z,5E)-4-methylhepta-2,5-diene"
script ERROR: java.io.FileNotFoundException:
https://cactus.nci.nih.gov/chemical/structure/(4R,2Z,5E)-4-methylhepta-2,5-diene/file?format=sdf&get3d=true
$ load "$(2Z,5E)-4-methylhepta-2,5-diene"
C8H14
$ calculate chirality
$ print {chirality != ""}.label("%i%[chirality]").join("")
2R3Z4Z6E7E
(Note that Jmol assigns E/Z, R/S, and M/P chirality to both ends of an
alkene, cumulene, or atropisomeric bond, and that these numbers are not the
same as in the name.)
​Bob
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