Cc1cc(C(=O)OCC(=O)NCCc2ccc(S(N)(=O)=O)cc2)c2ccccc2n1
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?