(1R,2R,3S)-5-(n-butyl)-1-(tert-butyldimethylsiloxy)-3-hydroxy-2-methoxycarbonyl-2,4-dimethyl-4-cyclopentene

(2S,3R)-4-(n-butyl)-3-(tert-butyldimethylsiloxy)-2-methoxycarbonyl-2,5-dimethyl-4-cyclopenten-1-one

(1S,2R,3R)-4-(n-butyl)-1,3-bis(tert-butyldimethylsiloxy)-2-hydroxymethyl-2,5-dimethyl-4-cyclopentene

(1S,2R,3R)-4-(n-butyl)-1,3-bis(tert-butyldimethylsiloxy)-2-methoxycarbonyl-2,5-dimethyl-4-cyclopentene

3-(2-(tert-butyldimethylsilyloxy)ethyl)indoline