1018-28-6 AC 47921 American cyanamid AC 47,921 American cyanamid EL-47921 E.I. 47921 ENT 27,092 O,O-Diethyl S-((2-methyl-1,3-dithiolan-2-yl)methyl)phosphorodithioate Phosphorodithioic acid, O,O-diethyl S-((2-methyl-1,3-dithiolan-2-yl)methyl) ester