(1S,3R)-3-hydroxy-2-(hydroxy-2-propylidene)-8-azabicyclo[5.3.0]decan-8-one

(3aS,10aS)-3a,4,5,6,10,10a-hexahydro-2H-furo[3,2-c]pyrrolo[1,2-a]azepine-2,8(9H)dione

(3aR,10aS,10bR)-octahydro-2H-furo[3,2-c]pyrrolo[1,2-a]azepine-2,8(1H)-dione

(S)-5-(1-iodovinyl)-1-(pent-4-enyl)pyrrolidin-2-one

ethyl 3-((S)-5-oxo-1-(pent-4-enyl)pyrrolidin-2-yl)but-3-enoate