octahydroindole-2-carboxylic acid , octahydroisoindole-1-carboxylic acid , and octahydro-3-oxoisoindole-1-carboxylic acid can replace proline in both sulfhydryl and non-sulfhydryl ace inhibitors to give compounds equipotent to captopril and enalapril both in vitro and in vivo .
C0033382
proline
C0006938
captopril