Cc1cccc(CN2C(=O)[C@@H]3Cc4c([nH]c5ccccc45)C(C)(C)N3C2=O)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?