A compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or methyl, is prepared by condensing a compound of the formula: ##STR2## wherein R.sup.2 is alkyl, aryl or aralkyl and R.sup.1 is same as above, or a reactive derivative thereof with 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid or an ester thereof to give a compound of the formula: ##STR3## wherein R.sup.3 is an ester residue and R.sup.1 and R.sup.2 are same as above, followed by hydrolysis or ammonolysis of said compound (IV). The compound (I) is useful as a diagnostic or therapeutic agent for angiotensin-related hypertension.
该公式化合物为:##STR1##其中R.sup.1为氢或甲基,通过将化合物:##STR2##其中R.sup.2为烷基、芳基或芳基烷基,R.sup.1与上述相同,或其活性衍
生物与
1,2,3,4-四氢异喹啉-3-羧酸或其酯缩合制备化合物:##STR3##其中R.sup.3为酯基,R.sup.1和R.sup.2与上述相同,然后
水解或
氨解化合物(IV)。该化合物(I)可用作与肾素-
血管紧张素系统有关的高血压的诊断或治疗剂。