16808
Exposure of hepatocytes to iron ( FeSO4 ) caused elevation of reactive oxygen species ( ROS ) production , enhanced lipid peroxidation and protein carbonylation , depleted glutathione levels , decreased the antioxidant power ( FRAP ) of the cells and reduced cell viability .
 Chemical: iron; Chemical: FeSO4; Chemical: oxygen; Chemical: glutathione
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: iron; Chemical: FeSO4; Chemical: oxygen; Chemical: glutathione