CCCCCCC(=O)Nc1cc2nc3c(nc2cc1C)c(=O)n(C)c(=O)n3C
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?