Dihydrocyperaquinone

(-)-2,3-Dihydro-2-isopropenyl-5-methylbenzo[1,2-b:5,4-b']difuran-4,8-dione

2,3-Dihydro-5-methyl-2-(1-methylethenyl)benzo[1,2-b:5,4-b']difuran-4,8-dione

2,3,4,8-Tetrahydro-5-methyl-2-isopropenylbenzo[1,2-b:5,4-b']difuran-4,8-dione

(-)-2,3,4,8-Tetrahydro-5-methyl-2-isopropenylbenzo[1,2-b:5,4-b']difuran-4,8-dione