Abstract
Aqueous extract of the air-dried leaves and branches of Quercus stenophylla MAKINO (Japanes name "Urajirogashi") formed a precipitate on addition of lead acetate and from this precipitate, ellagic acid, succinic acid, catechol, pyrogallol, gallic acid, 3, 3'-di-O-methylellagic acid, quercetin, kaempferol, β-D-glucogallin, and isoquercitrin were isolated and identified. Examination of tannin in this plant showed that the so-called 'Urajirogashi' tannin is a hydrolysable tannin and consists of ellagitannin and gallotannin.
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