COc1ccc(CCNC(=O)C(=O)NCC(c2ccco2)S(=O)(=O)c2ccc(F)cc2)cc1
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?