28709
ETHNOPHARMACOLOGICAL RELEVANCE : To evaluate the antiprotozoal activity and cytotoxicity of extracts and fractions from the leaves , root bark and stem bark of Alstonia congensis ( Apocynaceae ) , used in traditional medicine against parasitic diseases .
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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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