CC(=O)NC(Cc1ccc(OP(=O)(OCc2ccc([N+](=O)[O-])o2)N(C)CCCCCl)cc1)C(=O)NC(C)c1ccc(OCC2CCCCC2)c(C(N)=O)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?