CCCCCCCCCCCCCCCC(=O)OCC1OC(OC)C2NP(=O)(N(CCCl)CCCl)OC1C2O
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?