1962 年 82 巻 11 号 p. 1479-1481
Two kinds of new flavone glycoside were isolated from the fresh leaves of Phegopteris polypodioides FÉE and they were named phegopolin (I) and phegokaempferin (II). (I) is obtained as yellow needle crystals of m.p. 203-204°, [α]D30 -31.64°, and its molecular formula corresponded to C22H22O10⋅H2O. Its hydrolysis yielded genkwanin and glucose but the properties of (I) were different from those of glucogenkwanin, coloring greenish brown to ferric chloride and its complete methylation being difficult, indicating the presence of a free hydroxy in 5-position. Consequently, the structure of genkwanin 4′-glucoside was given to phegopolin (I).
(II) is obtained as pale yellow needle crystals of m.p. 190-191°, [α]D30 -65.33°, and its molecular formula corresponded to C26H28O15⋅H2O. Its hydrolysis yielded kaempferol, arabinose, and glucose. Complete methylation of (II) with diazomethane, followed by hydrolysis produced 3-hydroxy-4′, 5, 7-trimethoxyflavone, showing that the sugar is bonded to 3-position as a disaccharide. Consequently, phegogaempferin (II) would be kaempferol 3-glucoarabinoside.