dimethyl (2R)-2-hydroxy-2-methylbutanedioate

(S)-(+)-柠苹酸

(R)-5-(2,2,4-trimethyl-1,3-dioxolan-4-yl)pentan-2-one

(R)-(+)-2-Methylbutane-1,2,4-triol

(R)-4-(2'-hydroxyaethyl)-2,2,4-trimethyl-1,3-dioxolan