CCOc1ccc(-c2[nH]nc3c2C(c2ccc4c(c2)OCO4)C(C#N)=C(N)O3)cc1OC
The negative base-10 logarithmic of dissociation constant (pKa) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?