12239
H2O2 - induced cytotoxicity and production of ROS were blocked in the presence of butein , and these effects were dose dependent .
 Chemical: H2O2; Chemical: butein
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: H2O2; Chemical: butein