Cc1cc(NC(=O)CSc2nc(-c3ccc(Br)cc3)nc3c2c(=O)n(C)c(=O)n3C)no1
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?