Cc1ccc(C)c(-n2c(SCC(=O)N3CCC(C(=O)O)CC3)nnc2-c2cccc(Cl)c2)c1
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?