COc1cc(CN(C2CCCCC2C)S(=O)(=O)c2ccc(S(=O)(=O)NC3CC3)cc2)cc(OC)c1OC
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?