2-Hydroxy-4-(((phenylamino)thioxomethyl)amino)benzoic acid 20679-94-1 4-14-00-02033 (Beilstein Handbook Reference) BRN 2876545 Benzoic acid, 2-hydroxy-4-(((phenylamino)thioxomethyl)amino)- N-Phenyl-N'-4-carboxy-5-hydroxyphenylthiourea PTU 20 Salicylic acid, 4-(3-phenyl-2-thioureido)- (6CI,8CI) U 1238 p-Phenylthioureidosalicylic acid