COc1ccc(C(C(=O)NC(C)(C)C)N(C(=O)CCC(=O)Nc2cc(C)on2)c2ccc(C)c(C)c2)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?