73427-92-6
methyl 6-cyano-1-hydroxy-7-methyl-5-oxo-3,5-dihydroindolizine-2-carboxylate
→
58610-63-2
7-甲基-1,5-二氧代-1,2,3,5-四氢吲哚嗪-6-甲腈
58610-61-0
ethyl 5-cyano-4-methyl-6-oxo-1H-pyridine-2-carboxylate