2920232-20-6 tert-butyl (4aR,7S,7aS)-7-formyl-1,3,4,4a,5,6,7,7a-octahydrocyclopenta[c]pyridine-2-carboxylate
2920207-26-5 tert-butyl (4aS,7S,7aR)-7-formyl-1,3,4,4a,5,6,7,7a-octahydrocyclopenta[c]pyridine-2-carboxylate