COc1ccc2cc1Oc1ccc(cc1)C[C@@H]1c3c(cc(OC)c4c3Oc3cc5c(cc3O4)CCN[C@H]5C2)CCN1C
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?