Synonyms: 4H-Cyclopenta[b]furan-4-one,2,3,3a,6a-tetrahydro-2-hydroxy-6a-(hydroxymethyl)-3-(2-propenylidene)-,(2S,3E,3aR,6aR)- (9CI); 4H-Cyclopenta[b]furan-4-one,2,3,3a,6a-tetrahydro-2-hydroxy-6a-(hydroxymethyl)-3-(2-propenylidene)-, [2S-(2a,3E,3aa,6aa)]-; (+)-Didemnenone B; Didemnenone B