(4aS,8S)-8-(2,3-Dihydroxy-propyl)-3-iodomethyl-hexahydro-pyrido[1,2-c][1,3]oxazin-1-one

(2S,6S)-methyl 2-((R)-2-(methoxymethoxy)pentyl)-6-(4-oxopentyl)piperidine-1-carboxylate

(2S,6S)-methyl 2-((S)-2-(methoxymethoxy)pentyl)-6-(4-oxopentyl)piperidine-1-carboxylate

(2S,6S)-methyl 2-allyl-6-((2S)-2-hydroxypentyl)piperidine-1-carboxylate