CCOC(=O)CNC(=O)CSc1nnc(Cn2c(=O)sc3ccccc32)n1-c1ccccc1C
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?