COC(=O)c1c(O)cccc1OCCCCNCCCc1ccc(N(C(=O)C(=O)O)c2ccccc2C(=O)O)c2ccccc12
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?