CCOC(=O)C1=CNS(=O)(=O)NC1c1ccc(C[C@H](NC(=O)CNC(=O)CCc2ccccc2)C(N)=O)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?