3-azido-4-(4-nitro-benzoyloxy)-azepane-1-carboxylic acid benzyl ester

methanesulfonic acid 1-benzyl-3-methoxymethoxy-piperidin-2-ylmethyl ester

[(5S,6S)-1-Benzyl-5-benzyloxy-6-methyl-piperidin-(2E)-ylidene]-acetic acid methyl ester

((4aS,6S,8aR)-5-Benzyl-2,2-dimethyl-hexahydro-[1,3]dioxino[5,4-b]pyridin-6-yl)-acetic acid methyl ester