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

(S)-1-Allyl-5-[(3aR,5S,6R,6aR)-5-((R)-1,2-dihydroxy-ethyl)-2,2-dimethyl-tetrahydro-furo[2,3-d][1,3]dioxol-6-yl]-pyrrolidin-2-one

(2R,3aR,9aS,9bR)-2-Methoxy-decahydro-3-oxa-6a-aza-cyclopenta[e]azulen-7-one

(7aR,8aR,11aR,11bR,11cS)-10,10-dimethyl-1,2,5,7a,8a,11a,11b,11c-octahydro-3H-[1,3]dioxolo[4',5':4,5]furo[3,2-c]pyrrolo[1,2-a]azepin-3-one

(7aR,8aR,11aR,11bR,11cS)-10,10-dimethyldecahydro-3H-[1,3]dioxolo[4',5':4,5]furo[3,2-c]pyrrolo[1,2-a]azepin-3-one