COc1cccc([C@@H]2Oc3ccc(OC)cc3/C(=N/O[C@@H](C)c3cc(-c4c(C)cc(C)cc4C)no3)[C@@H]2O)c1
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?