20397
Results showed that 7 - hydroxyisoflavone acted at an early step of EV71 replication .
 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