Telmisatran EP impurity H

Telmisatran EP impurity H is a brominated derivative of the parent antihypertensive drug Telmisatran, featuring a substituted benzyl ester moiety with a 4-bromophenyl ring. The compound retains the core 2,6-dimethyl-4-(1H-tetrazol-5-yl)benzoyl group but incorporates a bromine atom at the para-position of the phenyl ring, replacing the hydrogen involved in the ester linkage. This structural modification arises during synthetic pathways via electrophilic bromination. It serves as a critical HPLC reference standard for quantifying process-related impurities in Telmisatran formulations.