1-((E)-2-methyl-but-2-enoyl)-L-proline

(3S,8aS)-3-[(R)-bromoethyl]-3-methyl-1,4-dioxo-3,4,6,7,8,8a-hexahydro-1H-pyrrolo[2,1-c][1,4]oxazine

(R)-2,2-dimethoxy-3-methyl-pentan-3-ol

(S)-2-(tert-butoxy)-N-((S)-1-methoxy-3,3-dimethylbutan-2-yl)-N,2-dimethylbutanamide

(R)-2-((tert-butyldimethylsilyl)oxy)-N-((S)-1-methoxy-3-methylbutan-2-yl)-2-methylbutanamide