... cinnamic aldehyde or cinnamaldehyde (about 90 % of the essential oil from the bark) and, by reaction with of oxygen ... essential oil include ethyl cinnamate, eugenol (found mostly in the leaves), beta-caryophyllene, linalool, and methyl chavicol.Uses Cinnamon bark(cassia ... in killing mosquito larvae.Of the compounds found in the essential oil from cinnamon leaves, cinnamyl acetate, eugenol, and anethole ...