AKOS BBS-00004526

1,4,5,6-Tetrahydrocyclopentapyrazole-3-acylhydrazide is a pharmaceutical intermediate that can be prepared by first preparing ethyl 1,4,5,6-tetrahydrocyclopentapyrazole-3-carboxylate from cyclopentanone and diethyl oxalate as starting materials, and then reacting it with hydrazine hydrate to obtain 1,4,5,6-tetrahydrocyclopentapyrazole-3-acylhydrazide.