CC1OC(OC2CC(O)(C(=O)CO)Cc3c(O)c4c(c(O)c32)C(=O)c2ccccc2C4=O)CC(N)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?