CCOC(=O)[C@H]1[C@H]2COc3cc(OC)ccc3[C@@H]2N2C(=O)c3cc(C)ccc3NC(=O)[C@@]12C
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?