however , inhibitors of angiotensin i converting enzyme ( captopril ) , carboxypeptidase n ( mergetpa ) , neutral endopeptidase ( phosphoramidon ) , post proline cleaving enzyme and dipeptidyl ( amino ) peptidase iv ( diisopropylphosphofluoridate , dfp ) were without effect .
C0006938
captopril
C0033382
proline