Cc1ccc(C2(C)NC(=O)N(CC(=O)Nc3ccc4[nH]c(O)nc4c3)C2=O)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?