[1,2-b]furan
(+)-1-[(3R,3aS,5aR,6R,9bS)-6-Hydroxy-5a,9-dimethyl-2-oxo-2,3,3a,4,5,5a,6,7,9a,9b-decahydronaphtho[1,2-b]furan-3-ylmethyl]pyrrolidine-2(S)-carboxylic acid
(-)-1,2,6,7,8,9,10,11-Octahydro-1,6,6-trimethylphenanthro[1,2-b]furan-10,11-dione
(1aR,10aS,10bR)-4α,7α-Bis(acetyloxy)-8-(acetyloxy)methyl-2,3,4,5,6,7,10a,10b-octahydro-1a,5α-dimethyloxireno[9,10]cyclodeca[1,2-b]furan-9(1aH)-one
(1aR,1bS,2aS,3Z,4aR,7aR,8R,9aR)-3-(hydroxymethyl)-9a-methyl-7-methylidene-6-oxo-1a,1b,2a,4a,6,7,7a,8,9,9a-decahydrobisoxireno[5,6:7,8]cyclodeca[1,2-b]furan-8-yl (2Z)-4-(acetyloxy)-2-methylbut-2-enoate
(1aR,2R,6R,6aS,7aS,9aS)-2-(Acetyloxy)-1a,6,6a,8,9,9a-hexahydro-1a,5-dimethyl-2H-6,7a-(epoxymethano)bisoxireno[4,5:8,9]cyclodeca[1,2-b]furan-10-one
(1aR,3S,4Z,5aR,8aR,9R,10aR)-3-(acetyloxy)-4,10a-dimethyl-8-methylidene-7-oxo-1a,2,3,5a,7,8,8a,9,10,10a-decahydrooxireno[5,6]cyclodeca[1,2-b]furan-9-yl 2-methylpropanoate
(1aR,4E,5aR,8aR,9R,10aR)-3-(acetyloxy)-4,10a-dimethyl-8-methylidene-7-oxo-1a,2,3,5a,7,8,8a,9,10,10a-decahydrooxireno[5,6]cyclodeca[1,2-b]furan-9-yl (2Z)-2-methylbut-2-enoate
(1aR,4E,5aS,8S,8aS,10S,10aS)-10-Acetoxy-1a,3,5a,8,8a,9,10,10a-octahydro-4,8,10a-trimethyloxireno[5,6]cyclodeca[1,2-b]furan-7(2H)-one