Cc1ccccc1C(C#N)/C(=N/NC(N)=S)C(=O)Nc1c(C)cccc1C
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?