COc1cc(/C=C2\NC(=S)C3Cc4c(OC)c(C)c(OC)c(OC)c4C2N3C)c(OC)c(C)c1OC
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?