CC1(C)Cc2cccc(OCC(=O)OCC(=O)Nc3ccc(C(N)=O)cc3)c2O1
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?