CCCCc1nc2ccccc2c(=O)n1NC(=O)c1c(O)c2c(n(CC(C)C)c1=O)CCCC2
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?