O=S(=O)(c1ccccc1)N1CCCC(c2nc(O)c3nnn(Cc4ccccc4F)c3n2)C1
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?