COc1cc(O)c(C(CCN2CCCC2)c2cc(OC)c(OC)c(OC)c2)c(OC)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?