N=C(N)NS(=O)(=O)c1ccc(NC(=O)c2ccc(Cl)c3c(Nc4ccc(S(=O)(=O)N=C(N)N)cc4)c4ccccc4nc23)cc1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?