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Confirmation of the structure of fibraurin as 2r 2 alpha 6a alpha 7 alpha 7a beta 8a beta 9 beta 9a alpha 9b beta 2 furan 3 yl 7 hydroxy 6a 9b dimethyl 1 2 6 6a 7 7a 8a 9 9a 9b decahydro 9 7 epoxymethano 4h oxireno 6 7 naphtho 2 1 c pyran 4 11 dione



Confirmation of the structure of fibraurin as 2r 2 alpha 6a alpha 7 alpha 7a beta 8a beta 9 beta 9a alpha 9b beta 2 furan 3 yl 7 hydroxy 6a 9b dimethyl 1 2 6 6a 7 7a 8a 9 9a 9b decahydro 9 7 epoxymethano 4h oxireno 6 7 naphtho 2 1 c pyran 4 11 dione



Australian Journal of Chemistry 39(1): 177-182



The structure of fibraurin has been confirmed as [2R-(2.alpha.,6a.alpha.,7.alpha.,7a.beta.,8a.beta.,9.beta.,9b.beta.)]-2-(furan-3-yl)-7-hydroxy-6a,9b dimethyl-1,2,6,6a,7,7a,8a,9,9a,9b- decahydro-9,7-epoxymethano-4H-oxireno-[6,7]naphtho[2,1-c]pyran-4,11-dione (2) by a single-crystal X-ray structure determination. The relative stereochemistry is supported by nuclear Overhauser enhancement results.

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