CC1(C)CC(=O)C(C(C2=C(O)CC(C)(C)CC2=O)c2ccc(Cl)c([N+](=O)[O-])c2)C(=O)C1
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?