CC(C)CCC[C@@H](C)C1CCC2[C@@H]3CC=C4C[C@@H](OC(=O)CCC(=O)NCC[N+](C)(C)CCCS(=O)(=O)[O-])CC[C@]4(C)C3CC[C@@]21C
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?