Cc1ccc(CNC(=O)C2c3ccccc3C(=O)N(C)C2c2c[nH]c3ccccc23)o1
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?