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Results obtained indicated that there was a significant elevation in the levels of malondialdhyde ( MDA ) in nicotine injected rats .
 Chemical: malondialdhyde; Chemical: MDA; Chemical: nicotine
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: malondialdhyde; Chemical: MDA; Chemical: nicotine