CCc1ccc(C(=O)CC2(O)C(=O)N(CCc3ccccc3)c3ccc(Br)cc32)cc1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?