COc1cc(OC)c(OC)cc1CN1CCN(S(=O)(=O)c2ccc(NC(C)=O)cc2)CC1.O=C(O)C(=O)O
Molecules with a polar surface area of greater than 140 angstroms squared (Å2) tend to be poor at permeating cell membranes. What's the psa of this molecule?