CC(C)(C)C(=O)OC[N+](C)(C)CCOC(=O)C(O)(c1ccccc1)C1CCCC1.[Cl-]
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?