CCOC(=O)C1CCCN(C2CC(=O)N(c3ccc(N4C(=O)CC(N5CCCC(C(=O)OCC)C5)C4=O)cc3)C2=O)C1
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?