Cc1ccc(-n2nc3c(c2NC(=O)c2c(-c4ccccc4Cl)noc2C)CSC3)cc1
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?