C=C1C(O)C2(O)OCC34C(CC5C(C)=CC(=O)C(O)C5(C)C23)OC(=O)C(OC(=O)C/C=C(\C)CCCCC)C14
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?