CCCCN(CC(=O)NC(C)(C)C)C(=O)C(=O)Nc1ccc2c(c1)OCCO2
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?