CCN(CC)CCCNC(=O)c1sc2ncn(CC(=O)Nc3ccc(C)c(Cl)c3)c(=O)c2c1C
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?