CCc1cc(Cc2cc(CC)c(NC(=O)C(=O)Cc3ccccn3)c(CC)c2Cl)c(Cl)c(CC)c1NC(=O)C(=O)Cc1ccccn1
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?