<prompt> All of the following are vitamers of Vitamin B6, except:PyridoxinePyridoxonePyridoxalPyridoxamine  <response>: Vitamers:The term vitamers represents the chemically similar substances that possess qualitatively similar vitamin activity. Some good examples of vitamers are given below:Retinol, retinal and retinoic acid are vitamers of vitamin A.Pyridoxine, pyridoxal and pyridoxamine are vitamers of vitamin B6.Key Concept:Pyridoxine, pyridoxal and pyridoxamine are vitamers of vitamin B6.Ref : 1- Textbook of Biochemistry, Satyanarayana 