41940-43-6
5-氨基-3-甲基噻吩-2-羧酸乙酯盐酸盐
→
~98%
88796-28-5
2-羧酸乙酯-3-甲基-6-氨基噻吩
66066-39-5
ethyl 4-cyano-3-methylbut-3-enoate
~29%