CCOc1ccc(N2C(=O)CC(N3CCN(C(=O)CN4CCCC4)CC3)C2=O)cc1
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?