C=C(C)[C@]12C[C@@H](C)[C@@]34OC(Cc5ccccc5)(O[C@@H]1[C@@H]3C=C(COC(=O)Cc1cc(I)c(O)c(OC)c1)C[C@]1(O)C(=O)C(C)=C[C@H]14)O2
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?