CCCCCCCCCCCCC(=O)NCC(=O)NC(Cc1ccccc1)C(=O)Oc1ccc([N+](=O)[O-])cc1
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?