CCc1cccc(C)c1NC(=O)Cn1ccn(Cc2ccc(Cl)cc2)c(=O)c1=O
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?