CCCC(=O)C(CC)/C(CCC(=O)N(Cc1ccccc1)Cc1ccccc1)=N/NC(=O)C[N+](C)(C)C.[Cl-]
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?