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