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This Minireview presents an overview of the structural aspects of these hormones , which have roles in physiological processes such as insulin secretion , as well as a discussion on the relevant structural modifications used to improve these hormones for the treatment of type 2 diabetes .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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