2667-33-6 4-03-00-01136 (Beilstein Handbook Reference) BRN 1805681 Butanedioic acid, ((diethoxyphosphinyl)thio)-, diethyl ester O,O-Diethyl (S-1-(1,3-dicarbethoxy)ethyl) phosphorothiolate Phosphorothioic acid, O,O-diethyl S-(1-(1,3-dicarbethoxy)ethyl) ester Succinate malaoxon