COCCN1C(=O)c2oc3ccc(C)cc3c(=O)c2C1c1ccc(C(=O)OC)cc1
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?