N#C/C(=C\C1=C(N2CCOCC2)/C(=C\c2ccc(Cl)cc2)CC1)C(=O)Nc1ccccc1F
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?