51804-15-0
4-(tosyloxy)benzoic acid
→
~99%
64675-83-8
(4-carbonochloridoylphenyl) 4-methylbenzenesulfonate
98-59-9
对甲苯磺酰氯
+
99-96-7
乙酰水杨酸杂质A
对羟基苯甲酸