phenylmethyl 6-(tert-butyldiphenylsilyloxymethyl)-2-(2-ethoxycarbonylvinyl)-3-vinylpiperidine-1-carboxylate

5-(tert-butyldiphenylsilyloxymethyl)-8-ethylhexahydroindolizin-3-one

8-ethyl-5-hydroxymethylhexahydroindolizin-3-one

(5S,8R,8aS)-8-Ethyl-3-oxo-octahydro-indolizine-5-carboxylic acid

methyl (8-ethyl-3-oxooctahydroindolizin-5-yl)acetate