The synthetic triterpenoids, CDDO and CDDO-imidazolide, are potent inducers of heme oxygenase-1 and Nrf2/ARE signaling - Liby, K; Hock, T; Yore, M M; Suh, N; Place, A E; Risingsong, R; Williams, C R; Royce, D B; Honda, T; Honda, Y; Gribble, G W; Hill-Kapturczak, N; Agarwal, A; Sporn, M B (Cancer Res, 2005)