CCC(C)C(NC(=O)OC(C)(C)C)C(=O)Oc1ccc2c(=O)c(-c3ccc([N+](=O)[O-])cc3)coc2c1
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?