CN[C@@H](C)C(=O)N[C@H](C(=O)N1CCC[C@H]1C(=O)Nc1cccc2ccccc12)C(C)C.O=C(O)C(F)(F)F
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?