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The anti - HIV - 1 activity of GUT - 70 , a natural product derived from the stem bark of Chlophyllum brasiliense , was evaluated .
 Chemical: GUT - 70
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: GUT - 70