COc1ccc(/C=C2\C[C@H]3[C@@H]4CC=C5C[C@@H](OC(C)=O)CC[C@]5(C)[C@H]4CC[C@]3(C)\C2=N\O)cc1OC
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?