To this group there possibly belongs the "light sesquiterpene" which was isolated by Schimmel & Co.1) from Ceylon citronella oil and which possesses the following properties:

B. p. under atmospheric pressure 270 to 280° with much decomposition, at 137° under 15 mm. pressure; d16o 0,8643; aD15o + 1°28'; nD15.1,51849.

This sesquiterpene, of which no derivatives are known, is very unstable. When exposed to the air, it resinifies within a few days to a syrupy liquid.