1-styryl-1H-pyridin-2-one

1-Styryl-1H-pyridin-2-one is a heteroaromatic pyridone derivative featuring a conjugated styryl substituent at the 1-position of the pyridin-2-one core. The molecule incorporates a six-membered pyridine ring fused to an enol ketone, with a vinylbenzene moiety extending via a double bond. This impurity likely arises from Michael addition or condensation pathways during the synthesis of the parent pharmaceutical agent. It serves as an HPLC reference standard for quantifying process-related impurities in drug substance batches.