英文别名Pemetrexed Impurity 41; but-3-en-1-ol,4-Methylbenzenesulfonic Acid; 3-Buten-1-ol, 1-(4-methylbenzenesulfonate); 3-Butenyl Tosylate; Linagliptin Impurity CD10090; but-3-enyl 4-methylbenzenesulfonate; toluene-4-sulfonic acid but-3-enyl ester; but-3-enyl toluene-4-sulfonate; 4-TsO-1-butene; Pemetrexed Impurity 15 
