((3aS,5S,5aS,8R,9R,9aS,9bS)-5-Hydroxy-2,2,8-trimethyl-6-oxo-octahydro-[1,3]dioxolo[4,5-f]isochromen-9-yl)-carbamic acid benzyl ester

N-carbobenzoxy-5,6-O-isopropylidene-5,6,10-triepi-actinobolin

[(3R,4R,4aS,5S,6S,8S,8aS)-5,6-Bis-(tert-butyl-dimethyl-silanyloxy)-8-hydroxy-3-methyl-1-oxo-octahydro-isochromen-4-yl]-carbamic acid benzyl ester

[(3R,4R,4aS,5S,6S,8S,8aR)-5,6-Bis-(tert-butyl-dimethyl-silanyloxy)-8,8a-dihydroxy-3-methyl-1-oxo-octahydro-isochromen-4-yl]-carbamic acid benzyl ester

benzyl ((S)-1-(((3a'R,8'R,9'R,9a'R,9b'R)-5'-hydroxy-8'-methyl-6'-oxo-3a',4',8',9',9a',9b'-hexahydro-6'H-spiro[cyclohexane-1,2'-[1,3]dioxolo[4,5-f]isochromen]-9'-yl)amino)-1-oxopropan-2-yl)carbamate