C=C(CC[C@@H](C)[C@H]1CCC2[C@]3(C)CC[C@H]4C(C)(C)C(OC(=O)/C=C/c5ccc(O)c(OC)c5)CC[C@@]45C[C@]35CC[C@@]21C)C(C)C
A lower number of negative pKa indicates that the acid dissociates more entirely in water. What is the negative pKa of this molecule?