Proteracacinidins are polymeric
condensed tannins composed of
mesquitol. This type of tannin can be found in ''Acacia caffra'' (''
Senegalia caffra'').
[A novel doubly-linked proteracacinidin analogue from Acacia caffra. E Malan, A Sireeparsad, JFW Burger and D Ferreira, Tetrahedron letters, 1994]
The oxydative depolymerisation of proteracacinidins yields the
anthocyanidin
Anthocyanidins are common plant pigments, the sugar-free counterparts of anthocyanins. They are based on the flavylium cation, an oxonium ion, with various groups substituted for its hydrogen atoms. They generally change color from red through ...
teracacinidin.
References
Condensed tannins
Senegalia
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