COc1ccc(NC(=O)Cn2c(=O)n(CCC(=O)NCCc3ccc(OC)c(OC)c3)c(=O)c3ccccc32)cc1Cl
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?