19906-72-0 Bakkenolid A Bakkenolide A FUKINANOLIDE Fukinanolid NSC 292655 Spiro(furan-3(2H),2'-(2H)inden)-2-one, decahydro-3'a,4'-dimethyl-4-methylene-, (2'R-(2'alpha,3'aalpha,4'alpha,7'aalpha))- (9CI) Spiro(furan-3(2H),2'-indan)-2-one, 3'a,4,4',5,5',6',7',7'abeta-octahydro-3'abeta,4'beta-dimethyl-4-methylene-, (2'R)- (8CI)