C=CCN1C[C@H](C)N([C@@H](c2ccc(C(=O)N3CCCCC3)cc2)c2cccc(OC)c2)C[C@H]1C.O=C(O)C(=O)O
Molecules with a polar surface area of greater than 60 angstroms squared (Å2) is hard to pass brain blood barrier. What's the psa of this molecule?