CN(C(=O)c1cccc(NC(=O)Cc2ccc(NC(=O)C3CCN(S(=O)(=O)c4cccc([N+](=O)[O-])c4)CC3)cc2)c1)C1CCC1
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?