Fibleucin

9-(3-Furyl)-1,4,4a,5,9,10,10a,10b-octahydro-4-hydroxy-4a,10a-dimethyl-1,4-etheno-3H,7H-benzo[1,2-c:3,4-c']dipyran-3,7-dione

4,4a,9,10,10a,10b-Hexahydro-4-hydroxy-4a,10a-dimethyl-9-(3-furyl)-1,4-etheno-1H,3H-benzo[1,2-c:3,4-c']dipyran-3,7(5H)-dione