Hymenolin

(11R)-1,6β-Dihydroxy-2,3-didehydro-4-oxoambrosan-12-oic acid 12,6-lactone

(3R)-3,3aβ,4,5,6,6a,9a,9bβ-Octahydro-6aβ-hydroxy-3α,6α,9aα-trimethylazuleno[4,5-b]furan-2,9-dione