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  • (1aR,3aR,3bS,5aR,6R,8aS,8bS,10R,10aR)-10-methoxy-3a,5a-dimethyl-6-((R,E)-6-methyl-5-(tosylmethylene)heptan-2-yl)hexadecahydrocyclopenta[a]cyclopropa[2,3]cyclopenta[1,2-f]naphthalene

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