Phenolic sesquiterpenes including sesquichamaenol, 6-(2-hydroxy-4-meth
ylphenyl)-2-methyl-3-beptanone, and curcuphenol methyl ether have been
obtained from oxidative cleavage of bicyclic precursors by treatment
with acidic hydrogen peroxide in a process which probably parallels a
biogenetic step A ketone intermediate for curcudiol has also been acqu
ired in the same manner.