COc1ccc(S(=O)(=O)Nc2cccc3c2O[C@H](CN(C)Cc2ccc(Oc4ccccc4)cc2)[C@@H](C)CN([C@H](C)CO)C3=O)cc1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?