You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Based on the given information, generate a molecule that meets the desired specifications: The molecule is a phosphodiesterase inhibitor and belongs to the allergic disease treatment class of molecules.
user
O=C(OC(Cc1c(Cl)c[n+]([O-])cc1Cl)c1ccc(OC(F)F)c(OCC2CC2)c1)c1cc(NS(=O)(=O)CCCN2CCOCC2)ccc1C(F)(F)F
assistant