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In this study , we investigated the effect of longer ( 12 h ) suppression of ROS on metabolism - secretion coupling in beta - cells by exposure to tempol , a superoxide dismutase mimic , plus ebselen , a glutathione peroxidase mimic ( TE - treatment ) .
 Chemical: tempol; Chemical: superoxide; Chemical: ebselen; 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: tempol; Chemical: superoxide; Chemical: ebselen; Chemical: glutathione