1190-29-0 Butanedioic acid, ((dimethoxyphosphinothioyl)thio)-, 4-ethyl ester Malathion alpha-monoacid Malathion alpha-monocarboxylic acid O,O-Dimethyl S-(1-carboxy-2-carbethoxy)ethyl phosphorodithioate Phosphorodithioic acid, O,O-dimethyl ester, S-ester with 4-ethylmercaposuccinate Succinic acid, mercapto-, 4-ethyl ester, S-ester with O,O-dimethyl phosphorodithioate