COc1ccc(/C=C/c2nc(S(=O)(=O)c3ccccc3)c(NCCCN(C)C)o2)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 pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?