Cc1ccc(-c2csc(NC(=O)c3cccc(N4C(=O)CCC4=O)c3)n2)o1
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?