Cc1cccc(NC(=O)C(C)OC(=O)c2ccccc2NS(=O)(=O)c2cc(C)c(C)c([N+](=O)[O-])c2)c1
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?