COc1ccc(S(=O)(=O)N2CCOCC2)cc1NC(=O)c1cccc2c(=O)c(C)c(-c3ccccc3)oc12
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?