5-methoxy-2-methyl-1,3-oxazole

2-氧代-4-甲基戊酸甲酯

Methyl (Z)-2-(chloroacetamido)-4-methylpent-2-enoate

α-Acetylamino-α-methoxyisocapronsaeure-methylester

N-acetyl-(RS)-leucine methyl ester