C=CCn1c(SCC(=O)c2[nH]c(C)c(C(=O)OCC)c2C)nc2scc(-c3ccc(OC)cc3)c2c1=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?