172469-91-9 3-Pyridinecarboxylic acid, 4-[(3,5-dimethylphenyl)thio]-5-ethyl-1,2-dihydro-6-methyl-2-oxo-, ethyl ester 5-Ethyl-6-methyl-3-ethoxycarbonyl-4-[(3',5'-dimethylphenyl)thio]pyridin-2(1H)-one;3-(EtOCO)-2-Pyridinone, 4-PhS deriv. AIDS-043213 AIDS043213