20396
Time course study showed that treatment of Vero cells with 7 - hydroxyisoflavone at indicated times after EV71 inoculation ( 0 - 6 h ) resulted in significant antiviral activity .
 Chemical: 7 - hydroxyisoflavone
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: 7 - hydroxyisoflavone