CC(C)[C@@H](C(=O)OCC(=O)Nc1ccc2c(c1)OCO2)N1C(=O)c2ccccc2C1=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?