COCCOC(=O)C1=C(C)NC(=O)NC1c1cn(-c2ccccc2)nc1-c1cccs1
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?