COCCN(C(=O)COC(=O)/C=C/c1ccccc1Cl)c1c(N)n(Cc2ccccc2)c(=O)[nH]c1=O
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?