2-Methyl-3-nitro-4-hydroxymethyl-6-hydroxypyridine-5-carboxylic acid sodium salt

6-methyl-7-nitro-2,5-dihydro-1H-pyrrolo[3,4-c]pyridine-3,4-dione

6-methyl-1,5-dihydrofuro[3,4-c]pyridine-3,4-dione

4-(ethoxymethyl)-6-methyl-2-oxo-1H-pyridine-3-carbonitrile

6-Methyl-7-nitro-1H-pyrrolo<3,4-c>pyridine-3,4(2H, 5H)-dione nitrate