CCOC(=O)CCCCCC(=O)Nc1ccc2c(c1)C(=O)N([C@H](C)CO)C[C@H](C)[C@@H](CN(C)C(=O)Nc1ccc(OC)cc1)O2
A lower number of pka indicates that the acid dissociates more entirely in water. What is pka of the molecule?