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Moreover , a dose dependent decline was noted in lipid peroxidation ( LPO ) and the nitric oxide assay ( NO ) at all doses of MKA ( 10 , 20 and 40 mg / kg , p . o . ) .
 Chemical: nitric oxide
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: nitric oxide