CCOc1ccc(C(=O)Nc2nnc(SCc3cc(=O)c4cc(C)ccc4[nH]3)s2)cc1
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?