532463 CDDO-Im 1-(2-cyano-3-,12-dioxooleana-1,9(11)-dien-28-oyl)imidazole 36 532457 CDDO-Im CDDO-imidazolide 11 532461 CDDO-Im C-28 imidazolide ester 2 532460 CDDO-Im CDDO and its imidazolide derivative 1 532458 CDDO-Im CDDO imidazolide imide 1 532459 CDDO-Im CDDO-Me and an imidazole analogue 1