Having -c(=x)-, Wherein X Is Chalcogen, Bonded Directly To The Five Membered Hetero Ring (e.g., Pyrrole Carbonyl Halides, Pyrrole Carboxaldehyde, Etc.) Patents (Class 548/530)
- And is bonded directly to a ring carbon which is adjacent to the ring nitrogen of the five-membered hetero ring (e.g., 4-hydroxy proline, etc.) (Class 548/532)
- Additional -C(=X) bonded directly to the five-membered hetero ring (e.g., N n-butyryl-L-proline, etc.) (Class 548/533)
- Chalcogen bonded directly to the other ring carbon which is adjacent to the ring nitrogen of the five-membered hetero ring (e.g., 2-pyrrolidone-5 carboxylic acid, etc.) (Class 548/534)
- The five-membered hetero ring is further unsubstituted or alkyl substituted only (e.g., proline, etc.) (Class 548/535)
- Additional -C(=X)- bonded directly to the five-membered hetero ring (e.g., pyrrole-3,4-dicarboxylic acid esters, etc.) (Class 548/536)