The bark of the Brazilian Dicypellium caryophyllatum, Nees (Persea caryophyllata, Mart.) formerly found a place in the apothecary shops as Cortex caryophyllatus. It is also known as Cassia caryophyllata, Ger. Nelkenrinde, Nelkenzimt1), Nelkencassie and Nelkenholz.
1) Bull. Soc. chim. III. 19 (1898), 638.
Upon distillation of the powdered bark, J. B. Trommsdorff2) obtained 4 p. c. of a light yellow oil which sank in water and had the odor of cloves.
With caustic potassa, soda and ammonia the oil yielded crystalline compounds from which it was separated unchanged upon addition of sulphuric acid. This behavior as well as its odor and density render it very probable that clove bark oil contains the same phenol as clove oil, viz., eugenol.