FIELD: organic chemistry, pharmacy. SUBSTANCE: invention relates to (E)-3-[2-n-butyl-1-{(4-carboxyphenyl)- -methyl}-1H-imidazole-5-yl]-2-(2-thienyl)-methyl-2-propenoic acid methanesulfonate (I) which is a receptor antagonist of angiotensin-II and can be used for control over arterial hypertension caused or exacerbated by angiotensin-II and for treatment of patients with congestive cardiac and renal failure and glaucoma. Compound (I) is synthesized by treatment of (E)-3-[2-n-butyl-1-{)4-carboxyphenyl)-methyl}-1H-imidazole- -5-yl]-2-(2-thienyl)-methyl-2-propenoic acid with methanesulfonic acid in 2-propanol at 8 C. EFFECT: improved method of synthesis. 5 cl, 9 ex
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