(1S,2R,3S,4R,4aS,11bR)-4-benzylamino-1-(tert-butyloxycarbonyloxy)-2,3-(isopropylidenedioxy)-6-(2'-methoxyethoxy)-2,3,4,4a,6,11b-hexahydro-1H-5,8,10-trioxa-cyclopenta[b]phenanthrene

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