CCC(C(=O)Nc1ccc(C(=O)OC)cc1)n1nc(-c2ccc(C)c(C)c2)ccc1=O
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?