2,5-Dihydroxymethyl-4-methoxy-3-methylpyridine

2,5-Dihydroxymethyl-4-methoxy-3-methylpyridine is a substituted pyridine derivative featuring two hydroxymethyl groups at the 2- and 5-positions, a methoxy substituent at position 4, and a methyl group at position 3. The molecule exhibits a rigid aromatic heterocyclic core with electron-donating methoxy and methyl groups, while the hydroxymethyl functionalities introduce steric bulk and potential hydrogen-bonding capacity. This compound arises as a process-related impurity during the synthesis of pyridine-based APIs, likely due to competing alkylation and hydroxylation pathways. Its distinct substitution pattern enables use as an HPLC reference standard for impurity profiling in parent drug manufacturing.