COc1c2c(c(C)c3c1C(=O)OC3)O[C@@]1(C)CC[C@@]3(O)C(C)(C)OC(=O)CC[C@]3(C)[C@H]1C2
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?