CC1OC(Oc2ccc3ccc(=O)oc3c2-c2c(O)ccc3cc(Oc4ccc5ccc(=O)oc5c4)c(=O)oc23)C(O)C(O)C1O
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?