Arecatannins are a class of condensed tannins in the sub-class procyanidins contained in the seeds of Areca catechu also called betel nut.Screening of various plant extracts used in ayurvedic medicine for inhibitory effects on human immunodeficiency virus type 1 (HIV-1) protease. Ines Tomoco Kusumoto, Takeshi Nakabayashi1, Hiroaki Kida, Hirotsugu Miyashiro, Masao Hattori, Tsuneo Namba and Kunitada Shimotohno, Phytotherapy Research, Volume 9, Issue 3, May 1995, pp. 180–184, 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.
Known molecules The following six known arecatannins have been detected in A. catechu seeds.
Arecatannin A1 Arecatannin A2 Arecatannin A3 Arecatannin B1 Arecatannin B2 Arecatannin C1
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