20696
In addition , molecular docking analysis of the representative compounds 11h , 11k , and 15a were performed , which not only revealed the impact of binding modes on DPP - 4 inhibitory activity , but also provided additional methodological values for design and optimization .
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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:
 None