137-07-5
2-氨基苯硫醇
+
762-21-0
丁炔二酸二乙酯
→
~82%
92906-70-2
ethyl 2-(2-ethoxy-2-oxoethyl)-3H-1,3-benzothiazole-2-carboxylate
108-56-5
草酰乙酸二乙酯