CCc1ccccc1NC(=O)C(C)n1nc(-c2ccc(C)c(C)c2)ccc1=O
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?