CC(C)[C@]1(NC(=O)[C@@H]2C=C3c4cccc5[nH]cc(c45)C[C@H]3N(C)C2)O[C@@]2(O)[C@H]3CCCN3C(=O)[C@H](Cc3ccccc3)N2C1=O
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?