10539-37-4 BRN 1868918 Diethyl N-amidinophosphoramidothionate N-Amidinophosphoramidothioic acid O,O-diethyl ester NSC 95203 Phosphoramidothioic acid, N-amidino-, O,O-diethyl ester Phosphoramidothioic acid, amidino-, O,O-diethyl ester (8CI)