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In nicotine group , a negative significant correlation between reduced glutathione and MDA ( r = - 0 . 92 ) was observed .
 Chemical: nicotine; Chemical: glutathione; Chemical: MDA
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: nicotine; Chemical: glutathione; Chemical: MDA