CCOC(=O)c1c(NC(=O)C2Cc3ccccc3C(=O)O2)sc2c1CCCC2
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?