COC(=O)C1=C(C(=O)OC)[C@]2([C@H]3CCCCN[C@@H](Cc4ccccc4)C(=O)N3Cc3ccccc3)C=C[C@H]1O2
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?