12-Hydroxy Nevirapine

12-Hydroxy Nevirapine is a structurally modified analog of the non-nucleoside reverse transcriptase inhibitor nevirapine, featuring a hydroxyl group substituted at the C12 position of the dihydropyridine core. This oxygenation introduces a polar hydroxyl functionality adjacent to the 2-pyridinyl and pyrazole moieties, altering the compound's solubility and metabolic stability. The hydroxyl substitution disrupts the aromaticity of the parent scaffold, creating a potential site for further oxidation or conjugation. As a critical API impurity, it arises via oxidative degradation pathways during nevirapine synthesis or storage. This compound serves as an HPLC reference standard for quantifying process-related impurities in nevirapine drug substance batches.