O=C(CN1C(=O)NC2(CCCc3ccccc32)C1=O)N1CCN(c2cccc(C(F)(F)F)c2)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?