Lexichem TK 2.5.2

Major bug fixes

• The perception of certain complex ring systems has been changed. Ring systems with three separate fused components are now named using VonBaeyer nomenclature rather than fusion nomenclature. In all but a few cases, these are more closely aligned with the IUPAC preferred names, and the resulting names round trip correctly.

Minor bug fixes

• A bug affecting several specific VonBaeyer ring system numberings has been fixed.