Cc1cc2c(c(C(=O)NCC(=O)O)c1)Oc1c(cc(C)cc1C(=O)NCC(=O)O)S2
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 negative pKa value is directly proportional to the standard Gibbs free energy change for the reaction. What is the negative pKa value of this molecule?