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A new vitamin D analogue , 22 - oxacalcitriol ( OCT ) , has been shown to have promising characteristics .
 Chemical: vitamin D; Chemical: 22 - oxacalcitriol; Chemical: OCT
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: vitamin D; Chemical: 22 - oxacalcitriol; Chemical: OCT