O=C(COC(=O)c1ccc(S(=O)(=O)NCc2ccco2)cc1)NCC1CCCCC1
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?