C[C@H]1CC(=O)[C@@]2(O)C#C/C=C\C#C[C@@H]3Nc4c(cc(O)c5c4C(=O)c4ccccc4C5=O)[C@]24O[C@@]134
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?