Cc1cc(C)cc(C(=O)NC(=S)Nc2ccc(-c3cc4ccccc4oc3=O)cc2)c1
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?