CN(C)CCNc1ccc(NCC[N+](C)(C)Cc2ccc([N+](=O)[O-])cc2)c2c1C(=O)c1c(O)ccc(O)c1C2=O.[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?