C[C@H](N)CN1CCc2ccc(Br)cc21.C[C@H](N)CN1CCc2ccc(Br)cc21.O=C(O)/C=C/C(=O)O
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?