We report here the reactivity and selectivity of three 5-Methoxy-N-3-Phenyl substituted-1, 3, 4-Oxadiazol-2 (3H)-ones (MPOX, as well as meta and para-PhenoxyPhenyl derivatives, ie MmPPOX and MpPPOX) with respect to the inhibition of mammalian digestive lipases: dog gastric lipase (DGL), human (HPL) and porcine (PPL) pancreatic lipases, human (HPLRP2) and guinea pig (GPLRP2) pancreatic lipase-related proteins 2, human pancreatic ...