1-cyclopenten-4-yl diazoacetoacetate

1,6-heptadien-4-yl acetoacetate

(rac)-6-endo-bicyclo[3.2.0]hept-2-en-6-ol

7,7-二氯二环[3.2.0]庚-2-烯-6-酮

(+)-4(S)-hydroxy-2-cyclopenten-1(R)-yl N-mesyl-(S)-phenylalaninate