Apixaban metamethoxy apixaban ester

Apixaban metamethoxy apixaban ester is a structurally modified derivative of apixaban, featuring an esterification of the parent compound's carboxylic acid moiety with a meta-methoxy benzyl group. This impurity retains the core pyrazole-benzimidazole scaffold but incorporates an electron-donating methoxy substituent at the meta position of the aromatic ester linkage, altering its physicochemical properties. The compound arises as a synthetic byproduct during apixaban manufacturing processes involving esterification steps. Its precise application lies as a reference standard for HPLC-based impurity profiling in pharmaceutical quality control.