CCOC(=O)CCCCCC(=O)Nc1ccc2c(c1)C(=O)N([C@@H](C)CO)C[C@@H](C)[C@H](CN(C)C(=O)Nc1ccccc1)OCCCC[C@H](C)O2
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?