CC(=O)N1CCc2ccc(NC(=O)c3c(-c4c(Cl)cccc4Cl)noc3C)cc21
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?