(4S,5S)-5-Iodomethyl-4-methyl-dihydro-furan-2-one

(4S,5R)-dihydro-5-hydroxymethyl-4-methyl-2(3H)-furanone

(S)-(+)-3-methyl-4-pentenoic acid

(S)-3-methyl-4-pentenoic acid benzyl ester

(S,Z)-methyl 5-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)hex-2-enoate