COc1ccc(C2C(Oc3ccccc3)C(=O)N2c2cc(C)ccc2C)cc1OC
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?