IPR-803(Cat No.:I017989)is a small-molecule inhibitor that disrupts the interaction between Nrf2 (nuclear factor erythroid 2–related factor 2) and its negative regulator Keap1. By blocking Keap1, IPR-803 stabilizes Nrf2, leading to enhanced transcription of antioxidant response element (ARE)-driven genes. This activation boosts cellular defense mechanisms against oxidative stress and electrophilic damage. IPR-803 is widely used in research exploring oxidative stress–related diseases, including cancer, neurodegenerative disorders, and inflammatory conditions. As a chemical probe, it provides valuable insights into the therapeutic potential of targeting the Keap1–Nrf2 signaling pathway.