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(1aR,3aR,3bS,5aR,6R,7R,8aS,8bR,10R,10aR)-5a-(((tert-butyldimethylsilyl)oxy)methyl)-6-((R)-4-hydroxybutan-2-yl)-10-methoxy-3a-methylhexadecahydrocyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-7-ol
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(R)-3-((1aR,3aR,3bS,5aR,6R,8aS,8bR,10R,10aR)-5a-(((tert-butyldimethylsilyl)oxy)methyl)-10-methoxy-3a-methyl-7-oxohexadecahydrocyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)butanoic acid
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methyl (R)-3-((1aR,3aR,3bS,5aR,6R,8aS,8bR,10R,10aR)-5a-(((tert-butyldimethylsilyl)oxy)methyl)-10-methoxy-3a-methyl-7-oxohexadecahydrocyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalen-6-yl)butanoate
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(2R,2aR,3aR,5aR,5bS,7aR,7bR,8R,11aS,12aS,12bR)-7a-(((tert-butyldimethylsilyl)oxy)methyl)-2-methoxy-5a,8-dimethyloctadecahydro-10H-cyclopropa[1',7a']indeno[5',4':4,5]indeno[2,1-b]pyran-10-one