[(5R,6S)-5-Acetoxy-6-acetoxymethyl-1-benzyl-piperidin-(2E)-ylidene]-acetic acid methyl ester

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

(2S,3S,6S)-3-Benzyloxy-6-(2-hydroxy-ethyl)-2-methyl-piperidine-1-carboxylic acid benzyl ester

(2S,3S,6R)-3-Benzyloxy-6-((Z)-dodeca-2,11-dienyl)-2-methyl-piperidine-1-carboxylic acid methyl ester

(4aS,6S,8aR)-5-Benzyl-6-[(Z)-9-(2-ethyl-[1,3]dioxolan-2-yl)-non-2-enyl]-2,2-dimethyl-hexahydro-[1,3]dioxino[5,4-b]pyridine