(+)-(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