O=C(OCc1ccccc1)N(CCCCN(CCCNC(=O)C(F)(F)F)C(=O)OCc1ccccc1)CCCNC(=O)C(F)(F)F
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?