Cc1ccc(C2(C)NC(=O)N(CC(=O)N3CCN(S(=O)(=O)c4cccc([N+](=O)[O-])c4)CC3)C2=O)cc1
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?