Fisetinidin
Encyclopedia
Fisetinidin is an anthocyanidin. It has been obtained from the heartwood of Acacia mearnsii, from the bark of Rhizophora apiculata
Rhizophora apiculata
Rhizophora apiculata is a species of plant in the Rhizophoraceae family. It is found in Australia , Guam, India, Indonesia, Malaysia, Micronesia, New Caledonia, Papua New Guinea, the Philippines, Singapore, the Solomon Islands, Sri Lanka, Taiwan,Maldives Thailand, Vanuatu, and Vietnam.Rhizophora...

and can also be synthesized.

Tannins

Fisetinidin can compose tannin
Tannin
A tannin is an astringent, bitter plant polyphenolic compound that binds to and precipitates proteins and various other organic compounds including amino acids and alkaloids.The term tannin refers to the use of...

s. The polymers are then called profisetinidin
Profisetinidin
A profisetinidin is a type of condensed tannins formed from fisetinidin.Mimosa and quebracho tannins are, according to a comparative 13C NMR study of polyflavonoids, found to be predominantly profisetinidin/prorobinetidin-type tannins....

(Porter, 1992).
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