21397
Platycodi Radix attenuates dimethylnitrosamine - induced liver fibrosis in rats by inducing Nrf2 - mediated antioxidant enzymes .
 Chemical: dimethylnitrosamine
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: dimethylnitrosamine