Cc1noc(C)c1S(=O)(=O)N(C)C[C@H]1Oc2ccc(NC(=O)NC(C)C)cc2C(=O)N([C@H](C)CO)C[C@@H]1C
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?