3-chloro-1-methylquinoxalin-2-one

1-甲基-1,4-二氢-2,3-喹喔啉二酮

ethyl 2-(4-methyl-3-oxo-3,4-dihydroquinoxalin-2-yl)hydrazine-1-carboxylate

N-甲基-1,2-苯二胺

乙酸酐