Table I.
Five major compounds commonly found in Thymus vulgaris (White thyme), Origanum vulgare (Oregano), Melaleuca alternifolia (Tea tree), and Cinnamomum cassia (Cassia) essential oils
| Number | Compound | % | References |
|---|---|---|---|
| White thyme | |||
| 1 | Thymol | 48.9–57.7 | (2,3) |
| 2 | p-cymene | 16.0–19.0 | (3,2) |
| 3 | γ-terpinene | 4.1–8.4 | (2,3) |
| 4 | Carvacrol | 2.8–3.5 | (3,2) |
| 5 | β-caryophyllene | 0–3.5 | (2,3) |
| Oregano | |||
| 1 | Carvacrol | 14.5–65.0 | (5,4) |
| 2 | Thymol | 0.3–12.6 | (4,5) |
| 3 | γ-terpinene | 4.3–11.6 | (4,5) |
| 4 | p-cymene | 0–9.0 | (4,5) |
| 5 | α-terpinene | 0.1–3.7 | (4,5) |
| Tea tree | |||
| 1 | Terpinen-4-ol | 39.8–40.4 | (6,7) |
| 2 | γ-terpinene | 17.8–19.5 | (6,7) |
| 3 | α-terpinene | 7.7–8.3 | (7,6) |
| 4 | 1,8-cineole | 4.5–5.2 | (6,7) |
| 5 | p-cymene | 2.3–4.7 | (6,7) |
| Cassia | |||
| 1 | Cinnamaldehyde | 30.4–85.0 | (8,9) |
| 2 | Methoxy-1,2-propanediol | 0–29.3 | (9,8) |
| 3 | δ-Methoxy-cinnamaldehyde | 8.8–25.4 | (9,8) |
| 4 | Coumarin | 0–6.4 | (9,8) |
| 5 | Glycerin | 0–3.0 | (9,8) |