Cc1cc(C2(c3ccc(O)c(C)c3)OC(=O)c3ccccc32)ccc1O
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?