63907-31-3 AC-47826 American cyanamid AC 47,826 American cyanamid EL-47826 Diethyl (4-ethyl-1,3-dithiolan-2-ylidene)phosphoramidate E.I. 47826 ENT 27,090 Imidocarbonic acid, (diethoxyphosphinyl)dithio, cyclic ethylethylene ester Imidocarbonic acid, phosphonodithio-, P,P-diethyl cyclic ethylethylene ester Phosphoramidic acid, (4-ethyl-1,3-dithiolan-2-ylidene)-, diethyl ester