N=C(N)NS(=O)(=O)c1ccc(NNc2c3ccccc3nc3c(C(=O)Nc4ccc(S(=O)(=O)Nc5ncccn5)cc4)cccc23)cc1
PSA is a commonly used medicinal chemistry metric for the optimization of a drug's ability to permeate cells. Please predict psa of this molecule.