Synonyms: 7H-5a,1-(Epoxymethano)-5H-cyclopenta[b]furo[3',2':3,4]cyclopenta[1,2-c]furan-5,7-dione,2-(1,1-dimethylethyl)octahydro-5b,11-dihydroxy-6-methyl-,(1S,2R,3aR,5aR,5bS,6S,8aS,9aS)-[partial]-;7H-5a,1-(Epoxymethano)-5H-cyclopenta[b]furo[3',2':3,4]cyclopenta[1,2-c]furan-5,7-dione,2-tert-butyloctahydro-5b,11-dihydroxy-6-methyl- (8CI); Bisnorginkgolide A;Dinorginkgolide A; [1S-(1a,2b,3ab,5aa,5bb,6b,8ab,9aR*)]-2-(1,1-Dimethylethyl)octahydro-5b,11-dihydroxy-6-methyl-7H-5a,1-(epoxymethano)-5H-cyclopenta[b]furo[3',2':3,4]cyclopenta[1,2-c]furan-5,7-dione