CCC(C(=O)Nc1ccc(C(=O)OC)cc1)n1nc(-c2ccc(C)cc2)c2c(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?