CCOC(=O)CC[C@H](NC(=O)[C@H](N)Cc1ccc(N(CCCl)CCCl)cc1)C(=O)OCC.O=C(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?