Cc1c(C(=O)CC(=O)C(=O)Nc2c(C(C)C)cccc2C(C)C)[n+]([O-])c2ccccc2[n+]1[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?