(6R,8S,8aR)-6,8-Bis-(tert-butyl-dimethyl-silanyloxy)-1,5,6,7,8,8a-hexahydro-isochromen-3-one

methyl (Z,3S,5R)-[3,5-bis(tert-butyldimethylsilyl)oxy-2-methylenecyclohexylidene]acetate

[(2S,3S,5R)-3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-2-(2-nitro-phenylselanylmethyl)-cyclohex-(Z)-ylidene]-acetic acid methyl ester