Arecatannins are a class of condensed tannins in the sub-class procyanidins contained in the seeds of Areca catechu also called betel nut.

[1] The arecatannin-type natural products from Ceylonese cassia bark and Areca seed are examples of polyphenols by both current definitions, and fit the distinct definition of a polymeric phenol as well.

[2] The following six known arecatannins have been detected in A. catechu seeds.

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