((2-Stibonophenyl)thio)acetic acid 2-(Carboxymethylmercapto)phenyl-stibonsaeure [German] 2-(Carboxymethylmercapto)phenylstibonic acid 63938-93-2 ACETIC ACID, ((2-STIBONOPHENYL)THIO)- Ro 2-1160