ethyl 2-[(1R,2R,3R)-3-hydroxy-2-[(1E,3S)-3-hydroxyoct-1-en-1-yl]-5-oxocyclopentyl]acetate

(R)-2-hydroxycarbonylmethyl-4-triethylsilyloxy-2-cyclopenten-1-one

(R)-2-(3-ethoxycarbonylphenoxycarbonylmethyl)-4-triethylsiloxy-2-cyclopenten-1-one