Candesartan ethyl ester is an organic intermediate used in the synthesis of candesartan, a selective angiotensin II type 1 (AT1) receptor antagonist. It features an ethyl ester group on the benzimidazole-7-carboxylic acid moiety, which protects the carboxylic acid during multi-step pharmaceutical synthesis. The compound is hydrolyzed to the free acid form of candesartan, the active ingredient in medications for treating hypertension and heart failure. This specialty chemical is typically supplied at high purity (e.g., ≥98%) for research and pharmaceutical manufacturing purposes.