CC(C)(C)c1cc(NC(=O)C(=O)c2cccc3ccccc23)n(-c2cccc(OCC(=O)O)c2)n1
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?