CCOC(=O)N1CCC(N2Cc3cccc(C(=O)N4CC(C)CC(C)C4)c3C2=O)CC1
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?