CC(C)[C@H](NS(=O)(=O)c1ccccc1F)C(=O)OCC(=O)Nc1cccc(S(N)(=O)=O)c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?