methyl (1R,2R,4S)-4-[(2-methoxyethoxy)methoxy]-2-((S)-6-hydroxy-1-heptenyl)-α-[(S)-(2-methoxyethoxy)methoxy]cyclopentane-β-butenoate

methyl (1R,2R,4S)-4-[(2-methoxyethoxy)methoxy]-2-[(S)-6-[[(dimethylethyl)dimethylsilyl]oxy]-1-heptenyl]-α-[(S)-(2-methoxyethoxy)methoxy]cyclopentane-β-butenoate

4-exo-methoxyethoxymethoxy-2-oxabicyclo[3.3.0]oct-7-en-3-one

methyl 4-(4-oxocyclopent-2-enyl)-4-methoxyethoxymethoxybut-2-enoate

methyl 4-(2-hydroxycyclopent-3-enyl)-4-methoxyethoxymethoxybut-2-enoate