O=C1[C@H]2CC[C@@H]3/C(=N\OCc4ccccc4)C[C@@H](O)[C@@H](O)[C@@H]3[C@@H]2C(=O)N1Cc1ccccc1
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?