4-methyl-1-oxo-2H-isoquinoline-3-carboxamide

4-methyl-1-oxoisochromene-3-carboxamide

methyl 1-chloro-4-methylisoquinoline-3-carboxylate

4-甲基-1-氧代-1,2-二氢异喹啉-3-羧酸甲酯