Cc1cc(=O)oc2cc(NC(S)=NNC(=O)c3c(Cl)cnn3C)ccc12
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?