(3S,8aS)-3-(bromomethyl)-3-butyltetrahydro-1H-pyrrolo[2,1-c][1,4]oxazine-1,4(3H)-dione

(R)-2-((4S,5S)-4-(methoxymethyl)-5-phenyl-4,5-dihydrooxazol-2-yl)hexan-2-ol

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

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

(S)-2-((tert-butyldimethylsilyl)oxy)-N-((S)-1-methoxy-3-methylbutan-2-yl)-N,2-dimethylhexanamide