C#CCCCO/N=C1/C[C@@H](O)[C@@H](O)[C@@H]2[C@@H]3C(=O)N([C@@H](C)c4ccccc4)C(=O)[C@H]3CC[C@@H]12
A lower number of pka indicates that the acid dissociates more entirely in water. What is pka of the molecule?