7-[(1R,2S,6R,7S,8R,9R)-4-Methyl-3,5-dioxo-9-((E)-3-oxo-oct-1-enyl)-10-oxa-4-aza-tricyclo[5.2.1.02,6]dec-8-yl]-heptanoic acid methyl ester 以73%的产率得到7-[(1R,2S,6R,7S,8R,9R)-9-((E)-3-Hydroxy-oct-1-enyl)-4-methyl-3,5-dioxo-10-oxa-4-aza-tricyclo[5.2.1.0
2,6]dec-8-yl]-heptanoic acid methyl ester