C[C@@H]1O[C@H](O[C@H]2[C@@H](O)[C@H](O)[C@H](O)[C@H](O)[C@H]2O)[C@@H](N)C[C@@H]1/N=C(\N)C(=O)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?