CCOc1cccc(N(C(=O)CCC(=O)Nc2cc(C)on2)C(C(=O)NC(C)(C)C)c2ccc(OC)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?