CO[C@@H]1[C@@H](OC2OC(C)C(OC3CC(C)(O)C(OC(=O)CC(C)C)C(C)O3)C(N(C)C)C2O)[C@@H](CC=O)C[C@@H](C)C(=O)/C=C\C2O[C@H]2C[C@@H](C)OC(=O)C[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?