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H . parviflora has been identified as an alternative to H . gordonii , and , as part of the process to develop H . parviflora , in vitro genotoxicity tests , as recommended by recent European Food Safety Authority guidance , were conducted on a dried powder preparation of H . parviflora aerial parts .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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