14620-44-1 Phosphorothioic acid, O,S-diethyl O-(2-isopropyl-6-methyl-4-pyrimidinyl) ester Phosphorothioic acid, O,S-diethyl O-(6-methyl-2-(1-methylethyl)-4-pyrimidinyl) ester Phosphorothioic acid,O,S-Diethyl O-(6-methyl-2-(1-methylethyl)-4-pyrimidinyl)ester