Cc1nnnn1/C(=C\c1ccccc1)C(=O)OCC(=O)Nc1cccc(S(=O)(=O)N(C)C)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?