Just a quick note to say that Daniel Lowe has released
OPSIN v.2.9.0, the first release since Oct 2023. This is now available via the EMBL-EBI
OPSIN server. The release notes describe a mixture of minor bug fixes and improvements:
Support for IUPAC recommended primed number-letter locants e.g. 2''a
Command-line output now includes warnings e.g. ambiguity
SMILES writer now starts from a * atom if one is present
Added numbering to nicotine
Correctly interpretation of locanted perhalo terms and perhaloalkylalkanes
Improved additive bond formation for phosphoryl
Corrected locants on tolyl and assume p-tolyl if unspecified
triazine is now interpreted as 1,3,5-triazine if unspecified
Corrected interpretation of dithiazolium
Fixed rare SMILES writing bug where slashes could be inconsistent
Fixed ylidenethenylidene being parsed as [ylidene][thenylidene] instead of [yliden][ethenylidene]
Fixed bug in spiro superscript inferring when a bridge is length 0
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