CCOC(=O)N1CCN(C(=O)c2cnc3ccc(S(=O)(=O)N(C)c4ccccc4C)cc3c2O)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?