(3S,4S)-3-Hydroxy-4-methyl-4-vinyl-dihydro-furan-2-one

(S)-3-[1-Hydroxy-2-(2-isopropyl-[1,3]dioxolan-2-yl)-ethyl]-3-methoxymethoxy-4-methyl-4-vinyl-dihydro-furan-2-one

(3R,4S)-3-[2-(2-Isopropyl-[1,3]dioxolan-2-yl)-acetyl]-3-methoxymethoxy-4-methyl-4-vinyl-dihydro-furan-2-one

(3S,4S)-3-methoxymethyloxy-4-methyl-4-[2-(2-nitrophenyl)seleno]-γ-butyrolactone

(3R,4R,3'R,4'S)-3-(3'-hydroxy-4'-methylhexanoyl)-3-methoxymethyloxy-4-methyl-4-vinyl-γ-butyrolactone