12241
In addition , butein - dependent HO - 1 expression was required for the inhibition of H2O2 - induced cell death and ROS generation .
 Chemical: butein; Chemical: H2O2
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: butein; Chemical: H2O2