(3β,4aβ,8α,8aα)-8-<<(1,1-dimethylethyl)dimethylsilyl>oxy>-3,4,4a,7,8,8a-hexahydro-3-methyl-2H-1-benzopyran-2-one

(3R,4aS,5S,6S,8S,8aS)-5-Bromo-8-(tert-butyl-dimethyl-silanyloxy)-6-hydroxy-3-methyl-octahydro-chromen-2-one

(3S,4aS,5S,6S,8S,8aS)-5-Bromo-8-(tert-butyl-dimethyl-silanyloxy)-6-hydroxy-3-methyl-octahydro-chromen-2-one