C[C@@H](CN1C2=NC[C@H](Cc3ccc(O)cc3)N2C[C@H]1Cc1ccc(O)cc1)NC(=O)CCC1CCCCC1
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?