(1S,4S)-4-((tert-butyldimethylsilyl)oxy)cyclopent-2-en-1-yl 4-nitrobenzoate

(1R,3S)-1-chloro-3-(tert-butyl-dimethylsiloxy)-4-cyclopentene

(1R,3R)-1-hydroxy-3-triphenylmethoxy-4-cyclopentene