CCOCC(=O)NC1CCc2cc(OC(=O)COCC)c(OC)c(OC)c2-c2ccc(SC)c(=O)cc21
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?