C=CCOC(=O)N1[C@H]2C#C/C=C\C#C[C@]3(O)C(=O)C[C@H](C)[C@]24O[C@]43C2=CC(=O)C=CC21OC
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?