D-天冬氨酸-4-叔丁酯;
DL-正亮氨酸;
D-天冬氨酸4-叔丁酯,D-天门冬氨酸4-叔丁酯;
D-天冬氨酸4-叔丁酯;
(2R)-2-amino-4-[(2-methylpropan-2-yl)oxy]-4-oxobutanoic acid