21409-76-7 AI3-27609 MC 2951 O-(1,2-Dihydro-1,6-dimethyl-2-oxo-4-pyridinyl) O,O-dimethyl phosphorothioate Phosphorothioic acid, O,O-dimethyl ester, O-ester with 4-hydroxy-1,6-dimethyl-2(1H)-pyridone Phosphorothioic acid, O-(1,2-dihydro-1,6-dimethyl-2-oxo-4-pyridinyl) O,O-dimethyl ester