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Computer modeling was employed to evaluate a selection of the new analogues docked into the CXCR4 X - ray structure and to rationalize discrepancies between the affinity and Matrigel in vitro assays .
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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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