plenolin

Dihydrohelenalin

11,13-dihydrohelenalin

(3S)-3β,4aβ,8α-Trimethyl-4α-hydroxy-3,3aα,4,4a,7aα,8,9,9aα-octahydroazuleno[6,5-b]furan-2,5-dione

(3S)-3,3aα,4,4a,7aα,8,9,9aα-Octahydro-4α-hydroxy-3β,4aβ,8α-trimethylazuleno[6,5-b]furan-2,5-dione

(3aS)-4,4a,7aα,8,9,9aα-Hexahydro-4α-hydroxy-3β,4aβ,8α-trimethylazuleno[6,5-b]furan-2,5(3H,3aαH)-dione