O=C(NCc1ccc2c(c1)OCO2)C(=O)NCC1OCCN1S(=O)(=O)c1cc(F)ccc1F
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?