Bazedoxifene N-oxide is an oxidized derivative of the parent compound, featuring an N-oxidized imidazole ring and a fluoro-substituted benzimidazole core. The molecule contains two methoxy groups, a phenolic hydroxyl, and a tertiary amine, with the N-oxide introducing a polar, electron-withdrawing functionality at the heterocyclic nitrogen. This structural modification alters the compound’s polarity and reactivity compared to bazedoxifene, rendering it a specific oxidative degradation byproduct. It serves as an HPLC reference standard for quantifying oxidative impurities in bazedoxifene API formulations.
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