6-Methyl-5-(phenylmethoxy)-3,4-pyridinedicarboxylic Acid is an intermediate in synthesizing 5-Hydroxy-6-methyl-3,4-pyridinedicarboxylic Acid (H946970), which is used in studies to identify 4-pyridoxic acid dehydrogenase gene in pyridoxine catabolism of Mesorhizobium loti MAFF303099.