COc1ccc(C(=O)[C@H]2[C@H]3C(=O)N(c4ccc(C)cc4)C(=O)[C@H]3C3C=CC=NN32)cc1
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?