CCOC(=O)c1c(N2CCOCC2)[nH]c(=O)c(C(c2c(Cl)cccc2Cl)c2c(O)c(C(=O)OCC)c(N3CCOCC3)[nH]c2=O)c1O
The negative base-10 logarithmic of dissociation constant (pka) for an acid is a direct consequence of the underlying thermodynamics of the dissociation reaction; the pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the pka value of this molecule?