COc1ccc(C)cc1NS(=O)(=O)c1ccc(NC(=O)CN(c2cc([N+](=O)[O-])ccc2C)S(C)(=O)=O)cc1
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?