Ketoprofen Impurity G

Ketoprofen Impurity G is a degradation byproduct formed via oxidative cleavage of the cyclohexyl ring in Ketoprofen, resulting in a conjugated aromatic system substituted with a 2-propionylamino group and a free carboxylic acid. Its planar structure features a para-substituted benzene core linked to an amide functionality, which enhances intermolecular interactions distinct from the parent drug. The absence of the cyclohexyl moiety reduces steric hindrance, promoting specific non-enzymatic hydrolysis pathways. This impurity serves as a critical HPLC reference standard for quantifying process-related degradation in Ketoprofen formulations.