Phenolic compounds

Flavonoids may protect against damage by ultraviolet Light

Isoflavonoids have antimicrobial activity

Isoflavonoids are found mostly in legumes such as the rotenoids, have strong insecticidal actions; others have anti-estrogenic effects. 

For example, sheep grazing on clover rich in isoflavonoids often suffer from infertility

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Sphingosine itself can be phosphorylated to produce sphingosine-1-phosphate (S1P) inside cells. 

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The amino group at C-2 bears a fatty acid in amide linkage.

The fatty acid is usually saturated or monounsaturated, with 16, 18, 22, or 24 carbon atoms.

Ceramide is the parent compound for this group.

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Archaea membrane lipids are isoprene-based lipids.

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A typical membrane lipid of archaea.

Diphytanyl moieties are 8 five-carbon isoprene groups condensed end-to-end.