COc1ccc(C(=O)NCC(=O)OCC(=O)Nc2ccc(C)c(S(=O)(=O)N(C)C)c2)cc1OC
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?