CC1(C)CC(=O)C(CC(=O)Nc2ccc(S(N)(=O)=O)cc2)=C(O)C1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?