C[C@@]12C[C@H]3OC(=O)[C@@H]1CO[C@]14O[C@]56[C@H]2[C@]1(O)[C@H](C[C@@]5(O)C(=O)O[C@@]36C)[C@H]1[C@H]4CC=C2CC=CC(=O)[C@@]21C
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?