C=CCOc1ccc(CN(C)CC(=O)N(CC(C)C)c2c(N)n(CC(C)C)c(=O)[nH]c2=O)cc1
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?