C[C@@H](CO)N1C[C@@H](C)[C@@H](CN(C)S(C)(=O)=O)Oc2ccc(NC(=O)Nc3cccc4ccccc34)cc2CC1=O
An acid's negative base-10 logarithmic dissociation constant (pKa) follows directly from its underlying thermodynamics; the negative pKa is directly proportional to its standard Gibbs free energy change. What is the negative pKa value of this molecule?