(3S,4S)-3-{3-[(2R,3R)-((Z)-3-But-1-enyl)-oxiranyl]-3-hydroxy-2-methyl-propionyl}-3-hydroxy-5-[1-phenyl-meth-(Z)-ylidene]-4-triethylsilanyloxy-pyrrolidin-2-one

(2S,3R)-(Z)-2,3-epoxy-hept-4-enal

(2R,3R)-(Z)-2,3-epoxy-hept-4-en-1-ol

(2R,3R)-(Z)-2,3-epoxy-4-(tert-butyldimethylsilyloxy)hept-4-ene

(3S,4S)-5-(Z)-benzylidene-3,4-dihydroxy-3-propionylpyrrolidin-2-one