COc1ccc(CCNC(=O)c2ccc(Cn3c(=O)c4ccccc4n(CC(=O)C(C)(C)C)c3=O)cc2)cc1OC
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?