CC(OC(=O)Cc1nnc(O)c2ccccc12)C(=O)Nc1cccc([N+](=O)[O-])c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?