Dimethyl orlistat impurity

Dimethyl orlistat impurity is a synthetic byproduct formed during orlistat's esterification process, featuring a dimethyl-substituted tertiary amide in place of the parent compound's terminal carboxylic acid. This impurity retains the tetrahydrofuran core and 4-chlorophenyl moiety of orlistat but exhibits distinct polarity due to the dimethyl substitution. It functions as an HPLC reference standard for monitoring synthetic process efficiency in orlistat API manufacturing.