Cc1cc(/C=C(/C#N)c2nc3ccccc3[nH]2)c(C)n1-c1ccccc1C(=O)O
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?