CCOc1ccccc1C1C(C(=O)Nc2ccccc2)=C(C)Nc2nc(SCC(=O)c3ccc(C)cc3)nn21
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?