Table 2.

Classification of different classes of chemical compounds.

Class	Types	Examples
Terpenoids	Monoterpenes	Geraniol, Limonene, α-Pinene, β-Pinene, Sabinene, α-Terpinene, β-Myrcene, Geranyl acetate, Linalool, and α-Thujone
	Sesquiterpenes	Bergamotene, Humulene, Nerolidol, Selinene, Farnesol, Germacrene, Carotol, Caryophyllene, β-Himachalene, and β-Bisabolene
	Diterpenes	Phytol, Vitamin A1, and Cembrene
	Triterpenes	Squaline, Saponins, and Ginsenoide
	Tetraterpenes	Carotenoids (e.g., α-carotene, β-carotene, lycopene) and Xanthophylls (lutein)
Phenolics	Phenylpropanoids	Apigenin, Quercetin, Myristicin, and Methylisoeugenol
	Flavonoids	Luteolin, Apigenin, Quercetin, Myristicin, and Kaempferol
	Tannins	Gallic acid and Ellagic acid