Cc1nc2cc(-c3ccc(Cl)cc3)nn2c(C)c1CCC(=O)NCc1ccco1
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?