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. 2021 Jan 20;9(2):99. doi: 10.3390/biomedicines9020099

Table 1.

A subgroup of flavonoids, their natural resources, and example.

Subgroup Chemical Structure Plant Source Example Ref.
Isoflavones graphic file with name biomedicines-09-00099-i001.jpg Soybeans, leguminous plants, microbes, Genistein, Daidzein, Glycerin, Formanantine [71,72,73,74]
Flavones graphic file with name biomedicines-09-00099-i002.jpg Leaves, flowers, and fruits Luteolin, Apigenin [75,76]
Flavanones graphic file with name biomedicines-09-00099-i003.jpg All citrus fruits Hesperidin, Naringenin [77]
Flavonols graphic file with name biomedicines-09-00099-i004.jpg Onions, berries, lettuce, tomatoes, grapes, and apples Kaempferol, Quercetin [78]
Neoflavonoids graphic file with name biomedicines-09-00099-i005.jpg Sri Lankan endemic plant Mesuathwaitesii Calophyllolide [79,80]
Flavanols(Flavan-3-ols) graphic file with name biomedicines-09-00099-i006.jpg Peaches, pears, blueberries, bananas, and apples Catechins, Epicatechins, Epigallocatechin [81,82]
Anthocyanins graphic file with name biomedicines-09-00099-i007.jpg Bilberries, cranberries, merlot grapes, blackberries, black currants, red grapes, strawberries, blueberries, and raspberries Cyanidin, Delphinidin, Malvidine [83]
Flavones graphic file with name biomedicines-09-00099-i008.jpg Leaves, flowers, and fruits Luteolin, Apigenin [84,85]
Flavanones graphic file with name biomedicines-09-00099-i009.jpg All citrus fruits Hesperidin, Naringenin [77]