COc1cc(OC)cc(C(=O)N[C@H](C(=O)Nc2c(C)n(C)n(-c3ccccc3)c2=O)C(C)C)c1
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?