Flavan-4-ol
Introduction

The **flavan\-4\-ols** (3\-deoxyflavonoids) are [flavone](/wiki/Flavone "Flavone")\-derived [alcohols](/wiki/Alcohol_%28chemistry%29 "Alcohol (chemistry)") and a family of flavonoids. Flavan\-4\-ols are colorless precursor compounds that polymerize to form red [phlobaphene](/wiki/Phlobaphene "Phlobaphene") pigments.Styles, E. D., \& Ceska, O. (1977\). The genetic control of flavonoid synthesis in maize. Canadian Journal of Genetics and Cytology, 19(2\), 289–302\.  They can be found in the sorghum. Glycosides (abacopterins [A](/wiki/Abacopterin_A "Abacopterin A"), [B](/wiki/Abacopterin_B "Abacopterin B"), [C](/wiki/Abacopterin_C "Abacopterin C") and [D](/wiki/Abacopterin_D "Abacopterin D") together with [triphyllin A](/wiki/Triphyllin_A "Triphyllin A") and [6,8\-dimethyl\-7\-hydroxy\-4‘\-methoxyanthocyanidin\-5\-O\-β\-d\-glucopyranoside](/wiki/6%2C8-dimethyl-7-hydroxy-4%E2%80%98-methoxyanthocyanidin-5-O-%CE%B2-d-glucopyranoside "6,8-dimethyl-7-hydroxy-4‘-methoxyanthocyanidin-5-O-β-d-glucopyranoside")) can be isolated from a [methanol](/wiki/Methanol "Methanol") extract of the rhizomes of *[Abacopteris penangiana](/wiki/Abacopteris_penangiana "Abacopteris penangiana")*.


What other sources of flavan-4-ols are there besides sorghum?