diethyl diazinane-1,2-dicarboxylate

六氢哒嗪

氯甲酸乙酯

benzyl ethyl 1,2,3,6-tetrahydropyridazine-1,2-dicarboxylate

1,2,3,6-四氢吡嗪-1,2-二羧酸二乙酯