CCCc1c(O)c(=O)c2c(OC)cc(OC)c3c4c(OC)cc(OC)c5c(=O)c(O)c(CCC)c(c1c23)c54
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?