O=C1OC2(CC1C1(O)C3CC4CC(C3)CC1C4)C1CC3CC(C1)CC2C3
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?