71083-05-1
7-甲氧基-4-氧代-1,4-二氢喹啉-3-羧酸乙酯
→
37611-57-7
1-ethyl-7-methoxy-4-oxoquinoline-3-carboxylic acid
53977-09-6
ethyl 1-ethyl-7-methoxy-1,4-dihydro-4-oxoquinoline-3-carboxylate