2-HYDROXY-4-METHOXYMETHYL-6-METHYLNICOTINONITRILE

3-CYANO-4-METHOXYMETHYL-6-METHYL-5-NITRO-2-PYRIDONE

3-CYANO-2-HYDROXY-4-METHOXYMETHYL-6-METHYL-5-NITROPYRIDINE,

1,2-Dihydro-4-methoxymethyl-5-nitro-6-methyl-2-oxopyridine-3-carbonitrile