Cc1cc(O)c2c(c1)CC(O)C1=C2C(=O)c2c(O)ccc(OC3CC(O)C(OC4CC(OC5CCC(O)C(C)O5)C(O)C(C)O4)C(C)O3)c2C1=O
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?