N=C(N)NS(=O)(=O)c1ccc(NC(=O)c2cccc3c(NNc4ccc(S(N)(=O)=O)cc4)c4ccccc4nc23)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?