(1H-tetrazol-byl) biphenyl-4-yllmethyll-1H-benzimidazole-7-carboxylic acid (26b, CV- 11974), inhibited the specific binding of [laI1AII to bovine adrenal cortical membrane with an ICw value of 1.1 X 10-7 M. The AII-induced contraction of rabbit aortic strips was antagonized by CV-11974 (ICs0 value, 3.0 X 1O-l0 M). Oral administration of CV-11974 to conscious normotensive rats at 1 mg/kg resulted in long-lasting inhibition of the AII- ...