The substructure search algorithm was optimized resulting in a significant performance increase for certain queries.
Adding CIP (Cahn-Ingold-Prelog) atom and bond stereo perception.
Adding two new options to the OEMDLQueryOpts namespace.
The CDX file reader was extended to read superatoms. Superatoms such as (Me, OEt, Ph) are represented in CDX files as disconnected fragments with no coordinates. OEChem now reads superatoms correctly, although no coordinates are assigned for the fragments.