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Effects of compounds 3 and 4 on Nrf2 activation in BV2 (A,C) and RAW264.7 (B,D) cells. The cells were treated with compounds 3 or 4 for 0.5, 1, and 1.5 h. Representative blots from three independent experiments are shown. Immunoblots were quantified using the ImageJ software. Band intensity was normalized to each β-actin or PCNA. * p < 0.05, ** p < 0.01, *** p < 0.001, # p < 0.05, ## p < 0.01, and ### p < 0.001, compared with the control group.
