Cc1cc(-n2c(SCC(=O)NCc3cccs3)nc3nnc(C)c-3c2N)ccc1Cl
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?