CC1=C(C(=O)Nc2cc(=O)n(C)c(=O)n2C)C(c2ccc([N+](=O)[O-])cc2)C(C(=O)Nc2cc(=O)n(C)c(=O)n2C)=C(C)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?