diethyl 2-[(2-nitrophenyl)hydrazinylidene]butanedioate

diethyl 2-[bis(2-chloroethyl)amino]but-2-enedioate

diethyl 4-methyl-o-phthalate

3-甲基-1-丁烯

4-Oxo-1,2,8,9-tetrahydro-4H,7H-imidazo[1,2,3-ij][1,8]naphthyridine-6-carboxylic acid ethyl ester