Reaction catalyzed by dipeptidyl-peptidase IV (3.4.14.5)
+
H2O
=
+
L-Pro-L-Ala-7-amido-4-trifluoromethylcoumarin
+
H2O
=
L-Pro-L-Ala
+
7-amino-4-trifluoromethylcoumarin