C[C@H]1CN([C@H](C)CO)C(=O)Cc2cc(NC(=O)Nc3cccc4ccccc34)ccc2O[C@H]1CN(C)Cc1ccc(Oc2ccccc2)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?