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Evaluation of alpha - glucosidase inhibitory activity led to the isolation of six triterpene saponins from the aerial parts of Glinus oppositifolius including one new and five known constituents .
 Chemical: triterpene saponins
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: triterpene saponins