CCOC(=O)c1c(N2CCCC2)[nH]c(=O)c(C(c2c(O)c(C(=O)OCC)c(N3CCCC3)[nH]c2=O)C(C)C)c1O
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?