Synonyms: Oxybuprocaine Hydrochloride Imp. A (EP), Tetracaine Hydrochloride Imp. A (EP),Benzylpenicillin Procaine Imp. A (EP), Oxybuprocaine Imp. A (EP), Tetracaine Imp. A (EP), 4-Aminobenzoic Acid, 4-Carboxyaniline, 4-Carboxyphenylamine, Actipol, Amben, Aniline-4-carboxylic acid, Anti-Chromotrichia factor, Anticanitic vitamin, Anticantic vitamin, Antichromotrichia factor, Bacterial vitamin H1, Chromotrichia factor, Hachemina, NSC 7627, PAB, PABA, Pabacyd, Pabafilm, Pabamine, Paraminol, Paranate, Romavit, Sunbrella, Trichochromogenic factor, Vitamin BX, Vitamin H’, p-Aminobenzoic acid, p-Carboxyaniline, p-Carboxyphenylamine, Benzocaine Impurity G, Benzylpenicillin Procaine Impurity A, Oxybuprocaine Hydrochloride Impurity A, Tetracaine Hydrochloride Impurity A, Oxybuprocaine Impurity A, Tetracaine Impurity A