COc1ccc(C(=O)C(C)OC(=O)c2cccc(S(=O)(=O)Nc3c(C)n(C)n(-c4ccccc4)c3=O)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?