CC(Oc1ccccc1)C(=O)Nc1ccc(C(=O)OCc2cc(=O)n3nc(C4CC4)sc3n2)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?