CC(OC(=O)CCc1nc(=O)c2ccccc2n1C)C(=O)NCc1ccc2c(c1)OCO2
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?