(3S,4S)-4-(2-benzyloxyethyl)-3-methoxymethyloxy-4-methyl-γ-butyrolactone

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

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

(3S,4R,4'S)-3-(3'-oxo-4'-methylhexenoyl)-3-methoxymethyloxy-4-methyl-4-vinyl-γ-butyrolactone

(3R,4R)-3-[3',3'-(ethylenedioxy)-3'-phenylpropanoyl]-3-methoxymethyloxy-4-methyl-4-vinyl-γ-butyrolactone