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Flavan-4-ol
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The flavan-4-ols (3-deoxyflavonoids) are flavone-derived alcohols and a family of flavonoids. Flavan-4-ols are colorless precursor compounds that polymerize to form red phlobaphene pigments.〔Styles and Ceska, 1977〕 They can be found in the sorghum.〔(Flavan-4-ol concentration in leaf tissues of grain mold susceptible and resistant sorghum plants at different stages of leaf development. Ramamurthi Jambunathan, Milind S. Kherdekar, J. Agric. Food Chem., 1991, 39 (6), pp 1163–1165 )〕 Glycosides (abacopterins A, B, C and D together with triphyllin A and 6,8-dimethyl-7-hydroxy-4‘-methoxyanthocyanidin-5-O-β-d-glucopyranoside) can be isolated from a methanol extract of the rhizomes of ''Abacopteris penangiana''.〔Flavan-4-ol Glycosides from the Rhizomes of Abacopteris penangiana. Zhao Zhongxiang, Ruan Jinlan, Jin Jing, Zou Jian, Zhou Daonian, Fang Wei and Zeng Fanbo, J. Nat. Prod., 2006, 69 (2), pp 265–268 〕
==Known flavan-4-ols==
* Apiforol
* Luteoforol
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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