((Carboxymethyl)thio)succinic acid (Carboxymethylthio)succinic acid 99-68-3 Butanedioic acid, ((carboxymethyl)thio)- Carboxymethylmercaptosuccinic acid EINECS 202-778-9 NSC 59711 Succinic acid, ((carboxymethyl)thio)- (8CI)