2-[[2-[(2-amino-3-methylbutanoyl)amino]-3-methylbutanoyl]amino]-3-methylbutanoic acid

亮酰胺-亮酰胺-亮氨酸

N-苄氧羰基-L-亮氨腈

alpha-叔丁氧羰基-L-苯丙氨酰-L-亮氨酸

(S)-2-(3,5-dinitro-4-oxopyridin-1(4H)-yl)-4-methylpentanoic acid