C=CCN(C(=O)CNC(=O)c1ccco1)C(C(=O)NC1CCCCC1)c1ccc(OC)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?