Chalcogen Attached Directly To The Bicyclo Ring System By Nonionic Bonding Patents (Class 549/51)
- Chalcogen attached directly to ring sulfur of the hetero ring by nonionic bonding (Class 549/53)
- Plural chalcogens bonded directly to the bicyclo ring system (Class 549/54)
- Nitrogen attached directly or indirectly to the bicyclo ring system by nonionic bonding (Class 549/55)
- Halogen attached directly or indirectly to the bicyclo ring system by nonionic bonding (Class 549/56)