Cc1cc(O)nc(CNC(=O)c2cccc(C(=O)NCc3cc(O)nc(C)n3)c2)n1
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?