sentence: Oltipraz , 5 - ( 2-pyrazinyl ) -4 - methyl-1 ,2 - dithiole-3-thione is an inducer of Nrf2 that has exhibited antioxidant , anticancer , and regenerative properties in different animal models and clinical trials by inducing the NQO1 isoenzyme [ 33,34,35,36 ] .