CC(C)n1ncc2c(C(=O)Nc3ccccc3SCC(N)=O)cc(C3CC3)nc21
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?