CCc1cccc2c(C(=O)COC(=O)c3ccc([N+](=O)[O-])s3)c[nH]c12
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?