Table 3.

Comparative constituents of several cinnamon species. Common constituents in cinnamon essential oil extracted from various plant parts of Cinnamomum zeylanicum and Cinnamomum cassia [22,23,31,32,33,34].

C. zeylanicum Bark	Composition	C. zeylanicum Leaf	Composition	C. cassia Bark	Composition	C. cassia Leaf	Composition
(E)-Cinnamaldehyde	44.2–75.7%	Eugenol	68.6–87.0%	(E)-Cinnamaldehyde	42.4–89.4%	(E)-Cinnamaldehyde	54.6–90.1%
Eugenol	1.6–13.3%	Eugenyl acetate	1.0–8.1%	(Z)-Cinnamaldehyde	0.6–12.3%	(E)-Cinnamyl acetate	1.4–12.5%
(E)-Cinnamyl acetate	0.3–10.6%	Linalool	0.2–5.0%	(E)-Cinnamyl acetate	0.1–5.4%	(Z)-Cinnamaldehyde	0.4–10.5%
Linalool	0.2–7.0%	(E)-Cinnamyl acetate	0.8–4.6%	Benzaldehyde	0.4–2.3%	Benzaldehyde	1.1–6.3%
beta-Phellandrene	1.5–8%	Benzyl benzoate	trace–4.1%	alpha-Terpineol	trace–2.0%	Eugenol	trace–5.8%
Beta-Caryophyllene	1.3–6.9%	Beta-Caryophyllene	1.9–4.1%	Coumarin	trace–1.9%	Cinnamyl alcohol	0–5.7%
p-Cymene	1.7–4.0%	Safrole	0–1.3%	Salicylaldehyde	0.04–1.8%	Salicylaldehyde	0.05–3.1%
1,8-Cineole	0.4–2.3%	(E)-Cinnamaldehyde	0.6–1.1%	Borneol	trace–1.3%	⍺-copaene	trace–3.0%
Benzaldehyde	trace–2.2%	p-Cymene	0.3–0.8%	Benzyl benzoate	trace–1.0%	Benzyl benzoate	trace–2.9%
alpha-Terpineol	0.4–1.6%	Cinnamyl alcohol	0–0.6%	Cinnamyl alcohol	0–0.04%	Delta-Cadinene	trace–2.6%
Camphor	trace–1.4%	1,8-Cineole	trace–0.6%			Coumarin	0.03–2.5%
		Beta-Phellandrene	0.2–0.5%			Phenylpropanol	trace–1.6%
						⍺-Amorphene	trace–1.1%
						Anisaldehyde	0–1.0%
						(E)-Cinnamic acid	trace–0.9%
						Methyl eugenol	trace–0.1%