Phenylethanoids are a type of phenolic compounds characterized by a phenethyl alcohol structure. Tyrosol and

hydroxytyrosol Hydroxytyrosol is an organic compound with the formula . Classified as a phenylethanoid, i.e. a relative of phenethyl alcohol, Its derivatives are found in a variety of natural sources, notably olive oils and wines. The compound is colorless sol ...

are examples of such compounds.

Glycosides

The red deadnettle (''

Lamium purpureum ''Lamium purpureum'', known as red dead-nettle, purple dead-nettle, or purple archangel, is an annual herbaceous flowering plant native to Europe and Asia. Varieties: * ''Lamium purpureum'' var. ''hybridum'' (Vill.) Vill. (synonym: ''Lamium hybr ...

'') contains phenylethanoid glycosides named lamiusides A, B, C, D and E. The aerial parts of '' Stachys officinalis'' contain phenylethanoid

glycoside In chemistry, a glycoside is a molecule in which a sugar is bound to another functional group via a glycosidic bond. Glycosides play numerous important roles in living organisms. Many plants store chemicals in the form of inactive glycoside ...

s, ( betonyosides A, B, C, D, E and F). Chemical investigation of methanol extracts from '' Pithecoctenium crucigerum'' (Bignoniaceae) showed the presence of five phenylethanoid glycosides ( verbascoside, isoverbascoside,

forsythoside B Forsythoside B is a natural product from the phenylpropanoid glycoside group, which is found in a number of plant species such as '' Marrubium alysson'', ''Phlomis armeniaca'', '' Scutellaria salviifolia'', ''Phlomoides tuberosa'', ''Phlomoides ro ...

, jionoside D and leucosceptoside B), these all active against

DPPH DPPH is a common abbreviation for the organic chemical compound 2,2-diphenyl-1-picrylhydrazyl. It is a dark-colored crystalline powder composed of stable free radical molecules. DPPH has two major applications, both in laboratory research: one is ...

. Verbascoside and echinacoside are phenylethanoid and phenylpropanoid hybrids forming ester bonds with sugars.

References

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