Cc1c(C(=O)O)oc2ccc(S(=O)(=O)NCc3ccc4c(c3)OCO4)cc12
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?