Cc1ccc(NC(=O)c2c(C)nc3sc(C(=O)Nc4ccc(F)cc4)c(N)c3c2-c2ccccc2Cl)c(C)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?