An amino acid derivative having an angiotensin I-converting enzyme inhibitor activity, a vasopressin antagonism and an atrial natriuretic peptide hydrolase inhibitor activity, and represented by general formula (I) wherein R¹ represents hydrogen or acyl; R² represents hydrogen, lower alkyl, cycloalkyl, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted arylalkyl or optionally substituted heteroarylalkyl; m and n represent each independently an integer of 0.1 or 2; and J represents a cyclic group having an angiotensin I-converting enzyme inhibitor activity.
The present invention relates to an amino acid derivative having an angiotensin I-converting enzyme inhibition activity, a vasopressin antagonism and an atrial natriuretic peptide hydrolase inhibition activity. This amino acid derivative is represented by the following general formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or an acyl group; R.sup.2 represents a hydrogen atom, a lower alkyl group, a cycloalkyl group, an ary group which may have a substituent, a heteroaryl group which may have a substituent, an arylalkyl group which may have a substituent or a heteroarylalkyl group which may have a substituent; m and n represent each independently an integer of 0, 1 or 2 and J represents a cyclic group having an angiotensin I-converting enzyme inhibition activity.