CCCCOc1ccc(N2C(=O)CC(NCCc3ccc(S(N)(=O)=O)cc3)C2=O)cc1
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?