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methyl 1-((2'-(2H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-ethoxy-1H-benzo[d]imidazole-7-carboxylate; CAS No.: 139481-69-9; As a chemical synthesis company, ChemShuttle delivers tetrazole-containing benzimidazoles for hypertensive drug development. The 2 -tetrazolyl biphenyl group mimics losartan s pharmacophore while the methyl ester balances lipophilicity. Our regioselective tetrazole alkylation prevents N1/N2 isomerization. The product enables efficient structure-based design of angiotensin receptor blockers with improved bioavailability.