Ethyl 2-hydroxy-5-nitronicotinate Ethyl 2-hydroxy-5-nitronicotinate 95+% Ethyl 2-hydroxy-5-nitropyridine-3-carboxylate, 3-(Ethoxycarbonyl)-2-hydroxy-5-nitropyridine, Ethyl 1,2-dihydro-5-nitro-2-oxopyridine-3-carboxylate Ethyl 2-hydroxy-5-nitropyridine-3-carboxylate Ethyl 5-nitro-2-oxo-1,2-dihydropyridine-3-carboxylate 3-Pyridinecarboxylic acid, 1,2-dihydro-5-nitro-2-oxo-, ethyl ester