CC[C@]1(Cc2ccc(OC)c(OC)c2)C=[N+]([O-])O[C@H](OC2CCCC2(c2ccccc2)c2ccccc2)[C@@H]1OC(C)=O
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?