COC(=O)C(Cc1c(C2Nc3ccccc3C2CC(NC(=O)CNC(C)=O)C(=O)OC)[nH]c2ccccc12)NC(=O)CNC(C)=O
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?