CCCCC(=O)O[C@]1(C(=O)CO)[C@H](C)C[C@H]2[C@@H]3CCC4=CC(=O)C=C[C@]4(C)[C@@]3(F)[C@@H](O)C[C@@]21C
A lower number of pka indicates that the acid dissociates more entirely in water. What is pka of the molecule?