25747
In the MEST assay , DNCB ( 1 % and 2 % ) induced a significant increase in ear thickness in nrf2 ( - / - ) as compared to nrf2 ( + / + ) mice suggesting a role for Nrf2 in the control of the inflammatory process .
 DNCB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 DNCB