has role is protonated form of ethyl ester organic heterobicyclic compound EC 3.4.15.1 (peptidyl-dipeptidase A) inhibitor antidepressant hypoglycemic agent antineoplastic agent dicarboxylic acid monoester dipeptide alpha-amino acid ester perindopril(1-) perindopril An α-amino acid ester that is the ethyl ester of <em>N</em>-{(2<i>S</i>)-1-[(2<i>S</i>,3a<i>S</i>,7a<i>S</i>)-2-carboxyoctahydro-1<em>H</em>-indol-1-yl]-1-oxopropan-2-yl}-<small>L</small>-norvaline CHEBI:8024