(2R,3R,3aS,6aR,7aS,8S,11S,11aS,11bR,11cS)-9-Bromo-11c-(tert-butyl-diphenyl-silanyloxymethyl)-11-methoxy-2-methoxymethoxy-3,8,11a-trimethyl-dodecahydro-6-oxa-benzo[de]anthracene-1,5,10-trione

(+)-(1β,12α,15β)-20-(tert-butyldiphenylsiloxy)-15-hydroxy-1-methoxy-12-(methoxymethoxy)picras-3-ene-2,11,16-trione

(+)-(1β,12α,15β)-20-(tert-butyldiphenylsiloxy)-1-methoxy-12-(methoxymethoxy)-15-(trimethylsiloxy)picrasane-2,11,16-trione

(+)-<1β,12α,15β(S)>-20-(tert-butyldiphenylsiloxy)-1,12-dihydroxy-15-(2-hydroxy-2-methyl-1-oxobutoxy)picras-3-ene-2,11,16-trione

(+)-<1β,12α,15β(S)>-20-(tert-butyldiphenylsiloxy)-15-(2-hydroxy-2-methyl-1-oxobutoxy)-1-methoxy-12-(methoxymethoxy)picras-3-ene-2,11,16-trione