13720
Among the isolated compounds , ent - 18 - acetoxykaur - 16 - en - 15 - one ( 20 ) displayed the most significant inhibition of superoxide anion generation and elastase release .
 Chemical: ent - 18 - acetoxykaur - 16 - en - 15 - one; Chemical: superoxide
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: ent - 18 - acetoxykaur - 16 - en - 15 - one; Chemical: superoxide