methyl (2-(3-methoxy-3-oxopropyl)hex-4-ynoyl)prolinate

6-(2-Methoxycarbonyl-ethyl)-5,8-dioxo-octahydro-indolizine-3-carboxylic acid methyl ester

8-[1-Chloro-eth-(E)-ylidene]-6-(2-methoxycarbonyl-ethyl)-5-oxo-octahydro-indolizine-3-carboxylic acid methyl ester

methyl 6-(3-methoxy-3-oxopropyl)-5-oxo-8-((triisopropylsilyl)oxy)-1,2,3,5,6,7-hexahydroindolizine-3-carboxylate