(3R,8aS)-hexahydro-3-(prop-2-enyl)pyrrolo[1,2-a]pyrazine-1,4-dione

(2R,RS)-2-(tert-butylsulfinamido)pent-4-enoic acid

(R)-2-amino-4-pentenoic acid amide

(R)-ethyl 2-((R)-1,1-dimethylethylsulfinamido)pent-4-enoate

(3S,5S,6R)-4-(benzyloxycarbonyl)-5,6-diphenyl-3-(2'-propenyl)-2,3,5,6-tetrahydro-4H-1,4-oxazin-2-one