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The ROS scavenger N - acetyl l - cysteine and the mitochondrial antioxidant Mito - TEMPO rescued the inhibitory effect of cucurbitacin I on Rac1 activation .
 N - acetyl l - cysteine, cucurbitacin I
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 N - acetyl l - cysteine, cucurbitacin I