23199
The superoxide dismutase ( SOD ) activity and malondialdehyde ( MDA ) level in cell supernatant were detected by kits while the intracellular reactive oxygen species ( ROS ) generation was determined by 2 , 7 - dichlorodihydrofluorescin diacetate ( DCFH - DA ) kit .
 Chemical: superoxide; Chemical: malondialdehyde; Chemical: MDA; Chemical: oxygen; Chemical: 2 , 7 - dichlorodihydrofluorescin diacetate; Chemical: DCFH - DA
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: superoxide; Chemical: malondialdehyde; Chemical: MDA; Chemical: oxygen; Chemical: 2 , 7 - dichlorodihydrofluorescin diacetate; Chemical: DCFH - DA