(3R,3aS,4S,4aR,8aS,9R,9aS)-3-methyldecahydro-4,9-epoxynaphtho[2,3-c]furan-1(3H)-one

(3R,3aR,4S,4aR,9aR)-4-Hydroxy-3-methyl-3a,4,4a,5,6,7,8,9a-octahydro-3H-naphtho[2,3-c]furan-1-one

(3R,3aR,4S,4aR,8aR)-4-Hydroxy-3-methyl-3a,4,4a,5,6,7,8,8a-octahydro-3H-naphtho[2,3-c]furan-1-one

(3R,3aS,4R,9S,9aS)-3-methyl-3a,4,5,6,7,8,9,9a-octahydro-4,9-epoxynaphtho[2,3-c]furan-1(3H)-one

1,1-dimethyl<(2R,6S)-2-formyl-6-methyl-1-piperidine>carboxylate