CCn1c(SCC(=O)Nc2oc(-c3ccccc3)c(-c3ccccc3)c2C#N)nnc1-c1ccncc1
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?