COc1ccc(C(=O)OCC(=O)N(C)C2CCS(=O)(=O)C2)cc1S(=O)(=O)N1CCCc2ccccc21
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?