COC1/C=C\OC2(C)Oc3c(C)c(O)c4c(O)c(c(C5SCCS5)c(O)c4c3C2=O)NC(=O)/C(C)=C\C=C/C(C)C(O)C(C)C(O)C(C)C(OC(C)=O)C1C
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?