Chalcogen Bonded Directly To A Ring Carbon Of The Five-membered Hetero Ring Which Is Adjacent To The Ring Nitrogen (e.g., 2-pyrrolidones, Etc.) Patents (Class 548/543)
- Nitrogen attached directly or indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/546)
- Chalcogen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/547)
- Carbon to carbon unsaturation between ring members of the five-membered hetero ring (e.g., maleimide, etc.) (Class 548/548)