CC(=O)c1ccccc1NS(=O)(=O)c1ccc2nc(C)n(NS(=O)(=O)c3ccccc3C(C)=O)c(=O)c2c1
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?