Synonyms: Ophiobola-3,7,19-trien-5-one,14,18-epoxy-25-hydroxy-, (6a,18R)-; Spiro[dicyclopenta[a,d]cyclooctene-3(7H),2'(3'H)-furan]-7-one,1,2,3a,4,4',5',6a,9a,10,10a-decahydro-6-(hydroxymethyl)-3',9,10a-trimethyl-5'-(2-methyl-1-propenyl)-,(2'S,3'S,3aR,5'R,6aR,9aS,10aR)- (9CI); Ophiobolin I;Spiro[dicyclopenta[a,d]cyclooctene-3(7H),2'(3'H)-furan]-7-one,1,2,3a,4,4',5',6a,9a,10,10a-decahydro-6-(hydroxymethyl)-3',9,10a-trimethyl-5'-(2-methyl-1-propenyl)-,[3S-[3a(3'R*,5'S*),3aa,6aa,9ab,10ab]]-