丁氧羰基-D-鸟氨酸-OH

D-PHE-CYS-TYR-D-TRP-ORN-THR-PEN-THR-NH2

benzyl 2-[(3S)-3-[(2-methylpropan-2-yl)oxycarbonylamino]-2-oxopiperidin-1-yl]acetate

N'-CBZ-D-鸟氨酸

(R)-2-氧代哌啶-3-氨基甲酸叔丁酯