2-[(carboxymethyl)sulfanyl]butanedioic acid, [(Carboxymethyl)thio]succinic acid, Carboxymethylmercapto-bernsteinsaeure, 2-[(carboxymethyl)sulfanyl]succinic acid, (+-)-2-(carboxymethylthio)succinic acid, Butanedioic acid,((carboxymethyl)thio), carboxymethylsulfanyl-succinic acid, Carboxymethylmercaptosuccinic acid