Keshavarzian A, Haydek J, Zabihi R, Doria M, D'Astice M, Sorenson JR. Agents capable of eliminating reactive oxygen species. Catalase, WR-2721, or Cu(II)2(3,5-DIPS)4 decrease experimental colitis. Dig Dis Sci. 1992 Dec; 37(12):1866-73.