Abstract
In the survey of the root constituents of a Japanese valerian indigenous to Tobishima Is., west of northern Honshu, a number of sesquiterpenoids have been isolated or detected. This valerian is characterized by containing sesquiterpenoids of the valerane skeleton (in particular, valeranone) in large quantities, but those of the kessane skeleton in minute amounts. The absence of kessyl glycol is especially noteworthy.
