CC1=CC2CC(C)=C(CC[C@]3(C)CC[C@H]([C@@H](C)C(=O)O)OO3)C(C)(C)C2CC1
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?