5-(5-oxo-1-cyclopentenyl)pentansaeure-methylester 、 1-iodo-3-tetrahydrofuranyloxy-trans-1-octene, isomer 2 生成 5-[(1R,2R)-2-((E)-(R)-3-Hydroxy-oct-1-enyl)-5-oxo-cyclopentyl]-pentanoic acid methyl ester 、 5-[(1R,2R)-2-((E)-(S)-3-Hydroxy-oct-1-enyl)-5-oxo-cyclopentyl]-pentanoic acid methyl ester