(4S,5R)-5-allyl-4-(tert-butyldimethylsiloxy)cyclohex-2-enone

(4aR,7aR,10aR)-8-Benzyl-5-benzyloxymethyl-7,9-dioxo-3,4,4a,7,7a,8,9,10-octahydro-pyrrolo[2,3-i]isoquinoline-2-carboxylic acid methyl ester

(S)-4-Hydroxy-2,3-diisopropoxy-4-((3aS,6S,7aR)-6-methoxy-2,2-dimethyl-3a,6,7,7a-tetrahydro-benzo[1,3]dioxol-5-yl)-cyclobut-2-enone

(2S,4S,5R)-4,5-dihydroxy-2-methylcyclohexanone

(4S,6S)-4-hydroxy-6-methylcyclohex-2-enone