Additional Hetero Ring, Which Is Attached Directly Or Indirectly To The Five-membered Hetero Ring By Nonionic Bonding Patents (Class 548/517)
- Ring carbon of each of the two nitrogen containing hetero rings is bonded directly to chalcogen (e.g., both rings may be bonded to the same oxygen atom or to different oxygen atoms, etc.) (Class 548/519)
- Ring nitrogens of the two nitrogen containing hetero rings are bonded directly to the same atom or chain, which chain may include a ring (Class 548/523)