A profisetinidin is a type of

condensed tannin Condensed tannins (proanthocyanidins, polyflavonoid tannins, catechol-type tannins, pyrocatecollic type tannins, non-hydrolyzable tannins or flavolans) are polymers formed by the condensation of flavans. They do not contain sugar residues. They ...

s formed from leuco-fisetinidin, the leucoanthocyanidin form of

fisetinidin Fisetinidin is an anthocyanidin. It has been obtained from the heartwood of ''Acacia mearnsii'', from the bark of '' Rhizophora apiculata'' and can also be synthesized. Fisetinidin is very similar in structure to fisetin, which itself differs in s ...

. ''

Mimosa ''Mimosa'' is a genus of about 590 species of herbs and shrubs, in the mimosoid clade of the legume family Fabaceae. The generic name is derived from the Greek word (''mimos''), an "actor" or "mime", and the feminine suffix -''osa'', "resembl ...

'' and

quebracho tannin Quebracho is a common name in Spanish to describe very hard (density 0.9–1.3) wood tree species. The etymology of the name derived from ''quiebrahacha'', or ''quebrar hacha'', meaning "axe-breaker". Species There are at least three similar c ...

s are, according to a comparative ¹³C NMR study of polyflavonoids, found to be predominantly profisetinidin/prorobinetidin-type tannins.Antioxidant activities of mangrove Rhizophora apiculata bark extracts, Afidah A. Rahima, Emmanuel Roccab, Jean Steinmetzb, M. Jain Kassima, M. Sani Ibrahima and Hasnah Osman, 2007
/ref> The expected masses found in mass spectrometry in quebracho tannin are 561, 833, 1105, 1377, 1393, 1651, 1667. Quebracho also yields

gallic acid Gallic acid (also known as 3,4,5-trihydroxybenzoic acid) is a trihydroxybenzoic acid with the formula C6 H2( OH)3CO2H. It is classified as a phenolic acid. It is found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants. It i ...

References

Condensed tannins {{polyphenol-stub