Procyanidin B4
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IUPAC name [(2R,3S,4S)-Flavan-3,3′,4′,5,7-pentol]-(4→8)-[(2R,3R)-flavan-3,3′,4′,5,7-pentol] | |
Systematic IUPAC name (2R,2′R,3S,3′R,4S)-2,2′-Bis(3,4-dihydroxyphenyl)-3,3′,4,4′-tetrahydro-2H,2′H-[4,8′-bi-1-benzopyran]-3,3′,5,5′,7,7′-hexol | |
Other names Procyanidin B4 | |
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Properties | |
Chemical formula | C30H26O12 |
Molar mass | 578.52 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references |
Chemical compound
Procyanidin B4 is a B type proanthocyanidin.
Procyanidin-B4 is a catechin-(4α→8)-epicatechin dimer. It is found in the litchi pericarp,[1] in grape seeds,[2] and, along with 4-cis-isomer of procyanidin B4, in beer.[3]
See also
References
- ^ Immunomodulatory and anticancer activities of flavonoids extracted from litchi (Litchi chinensis Sonn.) pericarp. Mouming Zhao; Bao Yang; Jinshui Wang; Yang Liu; Limei Yu; Yueming Jiang, 2007
- ^ Du, Yu; Lou, Hongxiang (4 September 2008). "Catechin and proanthocyanidin B4 from grape seeds prevent doxorubicin-induced toxicity in cardiomyocytes". European Journal of Pharmacology. 591 (1): 96–101. doi:10.1016/j.ejphar.2008.06.068. PMID 18611398.
- ^ Structure elucidation of proanthocyanidins: Direct synthesis and isolation from Pilsener beer. Jan Delcour, 1985 Archived 2011-07-06 at the Wayback Machine
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Types of procyanidins
- Dimers : Procyanidin A1
- A2
- Trimers:Cinnamtannin B1
- Tetramers: Arecatannin A2
- Dimers : Procyanidin B1
- B2
- B3
- B4
- B5
- B6
- B8
- D (ent-Epicatechin(4α→8)catechin)
- Trimers: Arecatannin B1 (epicatechin-(4β→8)-epicatechin-(4β→6)-catechin)
- Procyanidin C1 (epicatechin-(4β→8)-epicatechin-(4β→8)-epicatechin)
- Procyanidin C2 (catechin-(4α→8)-catechin-(4α→8)-catechin)
- Tetramers : Cinnamtannin A2
- Arecatannins
- Arecatannin A1
- Arecatannin A3
- Arecatannin B2
- Arecatannin C1
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