Cc1ccc(S(=O)(=O)N[C@H](C(=O)N2CCC(C(=O)NCC(=O)O)CC2)C(C)C)cc1
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?