C=C(C)C1CCC2=CC(CC3(C)OC3c3cc(C(=O)OC)c(o3)C1)OC2=O
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?