Renin inhibitory oligopeptides, their preparation and use.

摘要

Compounds of formula (I): <CHEM> [in which: A is a carbon-carbon bond or C1 - C3 alkylene; B is imino group or C1 - C2 alkylene; R<1> is C1 - C4 alkyl, C1 - C4 alkoxy, heterocyclic or optionally substituted amino; R<2> is optionally substituted phenyl or optionally substituted naphthyl; R<3> is thiazolyl, isoxazolyl or imidazolyl; R<4> is isopropyl or cyclohexyl; R<5> and R<6> are C1 - C4 alkyl, or, together with the carbon atom to which they are attached, C3 - C7 cycloalkyl; R<7> is hydrogen or optionally substituted C1 - C6 alkyl; and R<8> is hydrogen or C1 - C4 alkyl] have renin-inhibitory and, hence, hypotensive activities and are of value in the diagnosis and treatment of hypertension induced by failures in the renin-angiotensin system. They may be prepared by reacting together appropriate amino acids, lower oligopeptides or derivatives thereof.