O=C(N/N=C1/C[C@@H](O)[C@@H](O)[C@@H]2[C@@H]3C(=O)N(Cc4ccc5c(c4)OCO5)C(=O)[C@H]3CC[C@@H]12)OCc1ccccc1
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?