COc1cc(OC)c(OC)cc1/C=C1\Oc2cc(OCC(=O)N3Cc4ccccc4C[C@H]3C(=O)O)ccc2C1=O
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?