2,6-二羟基-3-氰基-4-甲基吡啶

2-Hydroxy-4-methyl-6-oxo-1,6-dihydro-3-pyridinecarboxamide

2-amino-4-methyl-6-oxo-1H-pyridine-3-carboxamide

2-amino-4-methyl-6-oxo-1,6-dihydro-pyridine-3-carboxylic acid ethyl ester

2,6-bis-benzyloxy-4-methyl-pyridine