134653-70-6
2-Dimethylaminomethylen-acetessigsaeureethylester
→
873450-22-7
4-甲基-2-吗啉-4-嘧啶-5-羧酸
78318-44-2
4-甲基-2-吗啉嘧啶-5-羧酸乙酯