14953
However , these substituted phenyl - benzopyrane compounds have been reported to exert a considerable quenching effect , causing false - positive results in the commonly used method of enzyme - based NA inhibition assays , and thus , reliability of the flavonoid - based NAIs reported in the literature .
 Chemical: phenyl - benzopyrane; Chemical: flavonoid
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: phenyl - benzopyrane; Chemical: flavonoid