3849-21-6
2-肟氰乙酸乙酯
→
91774-36-6
ethyl 2-acetamido-3-amino-3-sulfanylidenepropanoate
137307-57-4
2-acetylamino-malonamic acid ethyl ester
90877-70-6
31785-05-4
5-氨基-2-甲基噻唑-4-羧酸乙酯