CN(C(=O)c1cccc(NC(=O)Cc2ccc(NC(=O)C3CCN(C(=O)c4ccccc4)CC3)cc2)c1)C1CCCCC1
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?