O=C1c2ccccc2C(=O)N1c1nc(-c2ccc(Cl)cc2)cc(N2N=C(c3ccc(Br)cc3)CC2c2ccccc2)n1
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?