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Making notable changes to the overall structure and composition of the parent hormones , we synthesized the mimics and tested their durability against treatment with three proteases chosen for their specificity : pepsin , alpha - chymotrypsin , and pronase .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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