CO[C@H]1COC(=O)[C@H](C)NC(=O)C/C=C\[C@@H](C)[C@@H](NS(=O)(=O)c2ccc(C)cc2)COC(=O)C/C=C\[C@@H]1C
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?