53667-60-0 BRN 0809356 O,O-Diethyl O-(6-ethoxy-3-pyridazinyl) phosphorothioate O-(6-Ethoxy-3-pyridazinyl) O,O-diethyl phosphorothioate Phosphorothioic acid, O,O-diethyl O-(6-ethoxy-3-pyridazinyl) ester Phosphorothioic acid, O-(6-ethoxy-3-pyridazinyl) O,O-diethyl ester