4703-53-1
→
17664-98-1
(2R)-2-[[(2S)-2-amino-4-methylpentanoyl]amino]propanoic acid
51021-87-5
CBZ-亮氨酸甲酯
76863-45-1
(S)-benzyl (1-azido-4-methyl-1-oxopentan-2-yl)carbamate