Cn1c2c([N+](=O)[O-])cccc2c(=O)c2c(O)cc3c(c21)C=CC(C)(C)O3
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?