CN(C(=O)c1ccc(NC(=O)Cc2cccc(NC(=O)C3CCCN(C(=O)C4CCC4)C3)c2)cc1)C1CC1
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?