The present invention relates to carboxyalkyl dipeptides which are inhibitors of angiotensin-converting enzyme and are useful as antihypertensive agents and in the treatment of congestive heart failure. The compounds of the present invention are compounds of the formulae ##STR1## and the pharmaceutically acceptable salts thereof, wherein R and R.sup.6 are the same or different and are hydroxy or lower alkoxy; R.sup.1 is benzyloxylower alkyl or benzylthiolower alkyl; R.sup.2 is benzylthiomethyl, 2-phenylethylthiomethyl, naphthylmethylthiomethyl, methylbenzylthiomethyl; 2-(carboxyphenyl)ethyl or 2-(alkoxycarbonylphenyl)ethyl; and R.sup.3 is hydrogen, lower alkyl or aminolower alkyl.
本发明涉及一种羧基烷基二肽,它们是抑制
血管紧张素转换酶的
抑制剂,并可用作降压药物和治疗充血性心力衰竭的药物。本发明的化合物是具有以下结构的化合物:##STR1##及其药用可接受的盐,其中R和R.sup.6相同或不同,为羟基或低烷氧基;R.sup.1为苄氧基烷基或
苄硫醇烷基;R.sup.2为苄
硫甲基、2-苯乙
硫甲基、
萘甲
硫甲基、甲基苄
硫甲基;2-(羧基苯基)乙基或2-(烷氧羰基苯基)乙基;R.sup.3为氢、低烷基或
氨基低烷基。