24953
P . nigra ( Lodd . ) Munro leaf extract potently inhibited NF - kappa B - induced gene expression , while S . veitchii ( Carr . ) Rehder leaf extract exerted a selective COX - 2 inhibition .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None