O=C(Cn1c(=O)n(-c2ccccc2)c(=O)c2ccc(C(=O)NCc3ccc4c(c3)OCO4)cc21)Nc1ccc(F)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?