COc1cc2c(cc1Oc1ccc(OC)c3c1CC1c4c(cc(OC)c(OC)c4-3)CCN1C)CC1c3c(cc(OC)c(OC)c3-2)CCN1C.Cl
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?