COc1ccc(NC(=O)/C(=C/c2ccc(N(CCC#N)CCC#N)cc2)NC(=O)c2cc([N+](=O)[O-])ccc2Cl)cc1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?