COc1ccc(-c2ccc(CN3C(CC(C)C)C(=O)N(Cc4cn(Cc5ccco5)nn4)CCS3(=O)=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?