COC(=O)C(COC(C)(C)C)NC(=O)OC1C(=O)c2cc(OC)ccc2OC1c1cccc(OC)c1
An acid's negative base-10 logarithmic dissociation constant (pka) follows directly from its underlying thermodynamics; pKa is directly proportional to its standard Gibbs free energy change. What is the pka value of this molecule?