(4aR,6aR,9aS)-2-Hydroxy-8,8-dimethyl-octahydro-pentaleno[1,6a-c]pyran-5-one

methyl 1,2,4,6,6a,7,8,9-octahydro-8,8-dimethyl-2-oxopentaleno<1,6a-c>pyran-5-carboxylate

(2S,6aS,9aR)-1,2,4,6,6a,7,8,9-octahydro-5-iodo-2-methoxy-8,8-dimethylpentaleno<1,6a-c>pyran

(2S,4aS,6aS,9aR)-1,2,4,4a,6a,7,8,9-octahydro-5-iodo-2-methoxy-8,8-dimethylpentaleno<1,6a-c>pyran