CCN(CC)c1ccc(C2C(C(N)=O)=C(C)Nc3nc(SCc4ccccc4)nn32)cc1
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?