cis-2,5-dimethyl-1-(tert-butyldimethylsiloxy)-2-(acetoxymethyl)-5-<(methoxycarbonyl)methyl>tetrahydropyrrole

cis-2,5-dimethyl-1-(tert-butyldimethylsiloxy)-2-formyl-5-(2-oxohexyl)tetrahydropyrrole

1,5-dimethyl-8-(tert-butyldimethylsiloxy)-8-azabicyclo<3.2.1>octan-3-one