8-acetyl-6-(4-nitrophenyl)-2,3-dihydroindolizin-5(1H)-one

3-(8-acetyl-5-oxo-1,2,3,5-tetrahydroindolizin-6-yl)-5-nitrobenzoic acid

8-bromo-6-((trifluoromethyl)sulfonyloxy)-1,2,3-trihydroindolizin-5-one

methyl 5-oxo-7-vinyl-1,2,3-trihydroindolizine-8-carboxylate

methyl 6-(2-methylallyloxy)-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxylate