CCN(CC)S(=O)(=O)c1ccc(OCC(=O)NC(=O)Cc2ccccc2)c([N+](=O)[O-])c1
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?