CC1(C)CC(=O)c2cc(C(=O)Nc3ccc(Br)cc3)c(=O)[nH]c2C1
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?