CCc1ccc(-c2nc(NC(=O)c3ccc(OCC(=O)Nc4ccc(F)cc4)c(OC)c3)sc2C)cc1
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?