CCc1c(O)c2c(c(O)c1C(C)=O)C(=O)c1c(cc(O)c(C(=O)O)c1C(=O)O)C2=O
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?