Flavonoid Constituents in Leaves of Rumex acetosa LINNAEUS and R.japonicus HOUTTUYN

Abstract

A flavonoid compound, C₂₁H₂₀O₁₀, m.p. 253∼254°(decomp.), was isolated from the leaves of Rumex acetosa LINNAEUS and identified as vitexin. Quercitrin was isolated as yellow needles, C₂₁H₂₀O₁₁·1 2/3H₂ O, m.p. 180∼181°(decomp.), from the leaves of R.japonicus HOUTTUYN, and identified as such.