v2.1.0

• Added support for fractional multipliers e.g. hemihydrochloride
• Added support for abbreviated common salts e.g. HCl
• Added support for sandwich compounds e.g. ferrocene
• Improved recognition of names missing the last 'e' (common in German)
• Support for E/Z directly before double bond indication e.g. 2Z-ylidene, 2Z-ene
• Improved support for functional class ethers e.g. "glycerol triglycidyl ether"
• Added general support for names involving an ester formed from an alcohol and an ate group
• Grignards reagents and certain compounds (e.g. uranium hexafluoride), are now treated as covalent rather than ionic
• Added experimental support for outputting extended SMILES. Polymers and attachment points are annotated explicitly
• Polymers when output as SMILES now have atom classes to indicate which end of the repeat unit is which
• Support * as a superscript indicator e.g. 6 to mean superscript 6
• Improved recognition of racemic stereochemistry terms
• Added general support for names like "beta-alanine N,N-diacetic acid"
• Allowed "one" and "ol" suffixes to be used in more cases where another suffix is also present
• "ic acid halide" is not interpreted the same as "ic halide"
• Fixed some cases where ambiguous operations were not considered ambiguous e.g. monosubstitututed phenyl
• Improvements/bug fixes to heuristics for detecting when spaces are omitted from ether/ester names
• Improved support for stereochemistry in older CAS index names
• Many precision improvements e.g. cyclotriphosphazene, thiazoline, TBDMS/TBDPS protecting groups, S-substituted-methionine
• Various minor bug fixes e.g. names containing "SULPH" not recognized
• Minor vocabulary improvements

Internal XML Changes:

• Synonymns of the same concept are now or-ed rather being seperate entities e.g. <token>tertiary|tert-|t-</token>