CCOC(=O)Nc1ccc2c(c1)N(C(=O)CCN1CCN3CCCC3C1)c1ccccc1CC2.Cl.O
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?