CC(=O)[O-].Cc1cccc2nc3cccc(C(=O)NCCC[N+](C)(CCCNC(=O)c4cccc5nc6cccc(C)c6nc45)Cc4c([N+](=O)[O-])ncn4C)c3nc12
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?