CCCS(=O)(=O)c1c(S(=O)(=O)CCC)c2ccc(C(N)=O)cn2c1C(=O)c1ccc(OC)cc1
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?