Cc1cccc(NC(=O)CSc2nnc(CNC(=O)c3ccc(S(=O)(=O)N(C)C)cc3)n2-c2cccc(C)c2)c1
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?