CCOc1cc(C2N=C(O)c3c(sc4c3CCN(C)C4)N2)ccc1OC(=O)c1ccccc1Cl
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?