C=CCn1c(NS(=O)(=O)c2ccccc2)c(S(=O)(=O)c2ccc(C)cc2)c2nc3ccccc3nc21
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?