CCOC(=O)c1nnn(C(CC)C(=O)Nc2cc(C)ccc2OC)c1C(=O)OCC
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?