CN(C(=O)c1ccc(NC(=O)Cc2cccc(NC(=O)C3CCN(C(=O)C4CCC4)CC3)c2)cc1)C1CCCC1
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?