( 4r ) -3- [ ( 2s ) -3-mercapto-2-methylpropanoyl ] -4-thiazolidinecarboxylic acid ( ys-980 ) , a potent angiotensin i ( ai ) converting enzyme inhibitor , inhibited the contractile response of isolated guinea-pig ileum to ai but not to aii , while it potentiated the response to bradykinin .
C0026820
contractile
C0006100
bradykinin