CC(C)C[C@H](NC(=O)c1[nH]cnc1C(=O)N[C@@H](Cc1ccccc1)C(=O)OCc1ccccc1)C(=O)OCc1ccccc1
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?