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(1S,2R,3S,4R,4aS,11bR)-2-benzylamino-1,3,4-tri(acetoxy)-1,2,3,4,4a,11b-hexahydro-1H-5,8,10-trioxa-cyclopenta[b]phenanthrene-6-one
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(1S,2R,3S,4R,4aS,11bR)-4-benzylamino-1-(tert-butyloxycarbonyloxy)-2,3-(isopropylidenedioxy)-2,3,4,4a,6,11b-hexahydro-1H-5,8,10-trioxa-cyclopenta[b]phenanthrene-6-one
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(1S,2R,3S,4R,4aS,11bR)-1-hydroxy-2,3-(isopropylidenedioxy)-4-[N-benzyl-(4'-methylphenylsulfonyl)amino]-2,3,4,4a,6,11b-hexahydro-1H-5,8,10-trioxa-cyclopenta[b]phenanthrene