| (3aS,8R,8aS,9R,10aS)-9-tert- | butyl-8,9-dihydroxydihydro-9H-furo[2,3-b]furo[3',2':2,3]cyclopenta[1,2-c]furan-2,4,7(3H,8H)-trione |
| (5aR,8R,8aS,9R,10aS)-9-tert- | butyl-8,9-dihydroxydihydro-9H-furo[2,3-b]furo[3',2':2,3]cyclopenta[1,2-c]furan-2,4,7(3H,8H)-trione |
| (1S,8S,12S,5R,14R)-14-(tert- | butyl)-2,14-dihydroxy-4,6,11-trioxatetracyclo[6.6.0.0<1,5>.0<8,12>]tetradecane-3,7,10-trione |
| (3aS,5aR,8aS,9R,10aS)-8,9- | dihydroxy-9-(2-methyl-2-propanyl)dihydro-9H-furo[2,3-b]furo[3',2':2,3]cyclopenta[1,2-c]furan-2,4,7(3H,8H)-trione |
| 4H,5aH,9H- | furo[2,3-b]furo[3',2':2,3]cyclopenta[1,2-c]furan-2,4,7(3H,8H)-trione, 9-(1,1-dimethylethyl)-10,10a-dihydro-8,9-dihydroxy-,(3aS,5aR,8R,8aS,9R,10aS)- |
| 4H,5aH,9H- | furo[2,3-b]furo[3',2':2,3]cyclopenta[1,2-c]furan-2,4,7(3H,8H)-trione, 9-(1,1-dimethylethyl)dihydro-8,9-dihydroxy-, (3aS,5aR,8aS,9R,10aS)- |