1,2-Dihydro-1-(4-fluorophenyl)-5-(methoxycarbonyl)-2-oxopyridine1-Fluoro-4-[5-(methoxycarbonyl)-2-oxopyridin-1(2H)-yl]benzeneMethyl 1,6-dihydro-1-(4-fluorophenyl)-6-oxopyridine-3-carboxylate 97%Methyl 1-(4-fluorophenyl)-6-oxo-1,6-dihydropyridine-3-carboxylate