CCC(C)n1c(SCC(=O)Nc2ccccc2C(=O)OC)nc2ccsc2c1=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?