O=C1CC(NS(=O)(=O)c2ccc(F)cc2)CN1c1ccc2c(c1)OCCO2
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?