Releases
2.4.0
OPSIN is now licensed under the MIT License
Locant labels included in extended SMILES output
Command-line now has a name flag to include the input name in SMILES/InChI output (tab delimited)
Added support for carotenoids
Added support for Vitamin B-6 related compounds
Added support for more fused ring system bridge prefixes
Added support for anilide as a functional replacement group
Allow heteroatom replacement as a detachable prefix e.g. 3,6,9-triaza-2-(4-phenylbutyl)undecanoic acid
Support Boughton system isotopic suffixes for 13C/14C/15N/17O/18O
Support salts of acids in CAS inverted names
Improved support for implicitly positively charged purine nucleosides/nucleotides
Added various biochemical groups/substituents
Improved logic for determining intended substitution in names with too few brackets
Incorrectly capitalized locants can now be used to reference ring fusion atoms
Some names no longer allow substitution e.g. water, hydrochloride
Many minor precision/recall improvements
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