Table 22.

Nitrogen-containing metabolites and their biological activities or functions.

Name	Quinoa Part Used for Isolation	Biological Activity or Function	Ref.
Amaranthin (183)	Seeds	-	[316]
Betanin (184)	Seeds	-	[35]
		Antioxidant activity	[317]
Isobetanin (185)	Seeds	-	[35]
Betaine (186)	Seeds	-	[35]
3-Carboxy-1-(2-sulfoethyl)-pyridinium (187)	Seeds	-	[313]
Dopaxanthin (188)	Seeds	-	[316]
		Antioxidant activity	[318]
Indicaxanthin (189)	Seeds	-	[316]
Miraxanthin V (190)	Seeds	-	[316]
Trigonelline (191)	Seeds	-	[313]
		Anti-invasive activity	[319]
		Hypoglycemic effect	[320]
Trigonelline glucosylester (192)	Seeds	-	[313]
Trigonelline methylester (193)	Seeds	-	[313]