O=C(OC[C@@H]1O[C@@](O)(COC(=O)c2cccnc2)[C@H](OC(=O)c2cccnc2)[C@H]1OC(=O)c1cccnc1)c1cccnc1
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?