CC1=CC(C)CC(C)OC(=O)CC(c2ccc(O)cc2)NC(=O)C(Cc2c(Br)[nH]c3ccccc23)N(C)C(=O)C(C)NC(=O)C(C)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?