Cn1c(=O)c2c(nc(SCC(=O)Nc3ccc(F)cc3)n2Cc2ccc(Cl)cc2)n(C)c1=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?