CC1=C(NC(=O)/C(=N/NC(=S)NN)C2C(=O)CC(C)(C)CC2=O)C(=O)c2ccccc2C1=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?