(3R)-4-methyl-3-(phenylmethoxycarbonylamino)pentanoic acid

(S)-4-异丙基-2-恶唑烷酮

(4S,5R)-5-乙炔基-4-异丙基-1,3-恶唑烷-2-酮

(R)-(+)-4-异丙基-2-恶唑啉酮

Boc-D-缬氨酸