O=C1CC(C(OCc2ccccc2)C(OCc2ccccc2)C(OCc2ccccc2)C(COCc2ccccc2)OCc2ccccc2)CC(=O)N1
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?