Novel amino acid derivatives.

摘要

Compounds of the formula: (wherein R<1> is hydrogen or alkyl; R<2> is an optionally substituted carbocyclic or heterocyclic ring; Z is hydrogen or a group -COR<9>, (R<9> is alkyl or phenyl) in which R<1><0> is hydrogen, halogen, trihalomethyl, alkyl or alkoxy, R<1><1> and R<1><2> are each hydrogen, alkyl or phenyl substituted by R<1><0>, or R<1><1> and R<1><2> together represent alkylene and p is 1 or 2; q is 1 to 4; A is phenyl or cycloalkyl optionally substituted by halogen, trihalomethyl, alkyl or alkoxy; and m is zero and n is 1 to 4 or n is zero and m is 1 to 4; and non-toxic salts thereof, have an inhibitory effect on enkephalinase and are useful as analgesic, antianxiety and anticonvulsant agents.