C=C1C(=O)OC2/C=C(\C)CC3C=C(CCC=C(C)CCC12)C(=O)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?