Cc1cc(C(=O)CSc2nnnn2-c2ccc(O)cc2)c(C)n1Cc1ccc2c(c1)OCO2
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?