COc1ccc(N2CCN(CCNC(=O)CCCn3c(=O)[nH]c4cc(Cl)ccc4c3=O)CC2)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?