1246223-37-9
→
~99%
853058-42-1
4-氯-5氢-吡咯并[3,2-D]嘧啶-7-甲酸乙酯
853058-41-0
4,5-二氢-4-氧代-1H-吡咯并[3,2-d]嘧啶-7-羧酸乙酯
~82%
94-05-3
2-氰基-3-乙氧基丙烯酸乙酯