CCC(=O)Nc1ccccc1-c1nc2ccccc2n(CC(=O)c2ccc(C)c(C)c2)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?