(2S,4R)-1-(phenylthio)-2-methyl-4-(2'-methyl-1',3'-dioxolan-2'-yl)-pentane

(2S,4R)-methyl 2-methyl-4-(2'-methyl-1',3'-dioxolan-2'-yl)-pentanoate

(2S,4R)-4-Chlorocarbonyl-2-methyl-pentanoic acid methyl ester

dimethyl 2,4-dimethylpentanedioate