(2R,3a'R,5a'R,6a'R,6b'R)-4-((tert-butyldiphenylsilyl)oxy)-2',2'-dimethylhexahydro-4'H,5H-spiro[furan-2,5'-oxireno[2',3':3,4]benzo[1,2-d][1,3]dioxol]-5-one

1-(tert-butyl-diphenyl-silanyloxy)-3-(2-hydroxy-5,5-dimethyl-hexahydro-1,4,6-trioxacyclopropa[e]inden-2-yl)-propan-2-one

1-(tert-butyl-diphenyl-silanyloxy)-3-(2-hydroxy-5,5-dimethyl-hexahydro-1,4,6-trioxa-cyclopropa[e]inden-2-yl)-propan-2-one oxime