CC1(C)C(=O)C2C[C@]3(O)C4=CC(=O)OC(c5ccoc5)[C@]4(C)CCC3[C@](C)(C2=O)C1CC(=O)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?