D-丝氨酸

diethyl 2-acetamido-2-(hydroxymethyl)propanedioate

5-benzoylamino-5-(1-ethoxycarbonyl-1,4-dihydro-4-pyridyl)-4-oxo-1,3-dioxane

2-Azido-3-benzyloxy-propionic acid-benzyl ester

乙醇