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Additionally , the effects of wogonoside on mRNA expression of inducible nitric oxide synthase ( iNOS ) , cyclooxygenase 2 ( COX2 ) , TNF - alpha and IL - 6 were also investigated .
 Chemical: wogonoside; 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: wogonoside; Chemical: nitric oxide