The Five-membered Hetero Ring Shares Ring Carbons With Two Carbocyclic Rings (e.g., Tetrahydrocarbazoles, Etc.) Patents (Class 548/439)
- Having -C(=X)-, wherein X is chalcogen, bonded directly to the tricyclo ring system (e.g., carbazole-3-carboxylic acid, etc.) (Class 548/441)
- One of the benzene rings and an additional carbocyclic ring bonded directly to the same acyclic nitrogen (Class 548/442)
- Azido or sulfonyl attached directly to the tricyclo ring system by nonionic bonding (e.g., carbazole sulfonic acid, etc.) (Class 548/443)
- Chalcogen or nitrogen attached indirectly to the tricyclo ring system by acyclic nonionic bonding (Class 548/444)
- The tricyclo ring system is unsubstituted or is hydrocarbyl substituted only (e.g., N-vinyl carbazole, etc.) (Class 548/445)