Cc1ccc(-c2cc3ncc(C(=O)c4cc([N+](=O)[O-])ccc4O)cn3n2)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?