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MATERIALS AND METHODS : Gastric ulcers were induced in fasted rats by oral administration of absolute ethanol and then mucus content and glutathione ( GSH ) levels were measured .
 Chemical: ethanol; Chemical: glutathione; Chemical: GSH
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: ethanol; Chemical: glutathione; Chemical: GSH