Fukinolidol

Fukinolidiol

Bakkenolide III

(2R,3aα)-2'-Oxo-4'-methylene-7α,7aα-dimethylspiro[hydrindane-2,3'-oxolane]-3α,4β-diol

(1'R,3R,7'aβ)-1'β,7'α-Dihydroxy-3'aβ,4'β-dimethyl-4-methylenespiro[oxolane-3,2'-hydrindane]-2-one

(1'R,3R)-1',3',3'a,4,4',5,5',6',7',7'aβ-Decahydro-1'β,7'α-dihydroxy-3'aβ,4'β-dimethyl-4-methylenespiro[furan-3(2H),2'-[2H]inden]-2-one