O=C1[C@@H]2CC[C@H]3/C(=N\OC[C@@H](O)COCc4ccco4)C[C@@H](O)[C@@H](O)[C@@H]3[C@H]2C(=O)N1c1ccc(F)cc1F
A lower number of pka indicates that the acid dissociates more entirely in water. What is pka of the molecule?