ethyl 2-((1aS,2S,2aS,3R,6S,6aR,7aR)-2-hydroxy-7-oxo-1a,2,2a,3,6,6a,7,7a-octahydro-3,6-methanonaphtho[2,3-b]oxiren-2-yl)acetate

ethyl 2-((1S,4R,4aS,5S,6S,8aR)-5,6-dihydroxy-8-oxo-1,4,4a,5,6,7,8,8a-octahydro-1,4-methanonaphthalen-5-yl)acetate

(3aS,5aR,6S,9R,9aS,9bS)-5-((tert-butyldimethylsilyl)oxy)-9b-hydroxy-3a,4,5,5a,6,9,9a,9b-octahydro-6,9-methanonaphtho[2,1-b]furan-2(1H)-one

ethyl 2-((1aS,2S,2aS,3R,6S,6aR,7R,7aR)-7-((tert-butyldimethylsilyl)oxy)-2-hydroxy-1a,2,2a,3,6,6a,7,7a-octahydro-3,6-methanonaphtho[2,3-b]oxiren-2-yl)acetate

二茂铁