Cc1c(Cc2ccccc2)sc(NC(=O)/C=C/c2cccc3ccccc23)c1C(N)=O
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 pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?