CCCCCC1=C(C(=O)OC)C(C(=O)OCC)N(S(=O)(=O)C(F)(F)F)c2ccccc21
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?