CCOC(=O)NN(C(=O)OCC)C(C(=O)C1=CCCCC1)N(NC(=O)OCC)C(=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?