(1S,3R,3aR,4R,5R,6R,7aS)-4-tert-butyldimethylsiloxy-5,6-isopropylidenedioxy-3-[4-methoxy-3-(methoxymethoxy)benzyl]-7-methylene-1-(vinyl)octahydroindene

(2S,2aS,4R,4aS,5R,6R,7R,7aS,7bR)-5-tert-butyldimethylsiloxy-2-hydroxy-6,7-(O-isopropylidenedioxy)decahydroindeno[7,1-bc]furan-4-carbaldehyde

(2S,2aS,4S,4aS,5R,6R,7R,7aS,7bR)-5-tert-butyldimethylsilyloxy-2-hydroxy-6,7-(isopropylidenedioxy)decahydroindeno[7,1-bc]furan-4-carbaldehyde

(1R,3R,3aR,4R,5R,6R,7S,7aR)-4-tert-butyldimethylsiloxy-7-hydroxy-5,6-isopropylidenedioxy-3-[4-methoxy-3-(methoxymethoxy)benzyl]octahydroinden-1-carbaldehyde

(1R,3R,3aR,4R,5R,6S,7aR)-4-tert-butyldimethylsiloxy-5,6-isopropylidenedioxy-3-[4-methoxy-3-(methoxymethoxy)benzyl]-7-oxooctahydroinden-1-carbaldehyde