78983-46-7Relevant articles and documents
Chemical and Chemotaxonomical Studies of Ferns. LXXIII. New Flavonoids with Modified B-Ring from the Genus Pseudophegopteris (Thelypteridaceae)
Wada, Hiroshi,Fujita, Hiroyuki,Murakami, Takao,Saiki, Yasuhisa,Chen, Chiu-Ming
, p. 4757 - 4762 (2007/10/02)
Chemical studies of three representatives of the genius Pseudophegopteris (Thelypteridaceae) revealed that the genus is characterized by the occurrence of unusual flavonoids with a modifield B-ring related to protogenkwain (VII).From P. hirtirachis HOLTT., three novel compounds, protogenkwanone(1), tetrahydroprotogen wanone (II) and tetrahydroprotogen wanin (III), were isolated, along with protogenkwanin 4-O-β-D-glucoside (VI)from P.subaurita CHING, two new acylated glucosides of protogenkwanin 4-O-(2-O-acetyl)-β-D-glucoside (IV) and 4'-O-(6-O-acetyl)-β-D-glucoside (V), were obtained, together with I, II and VI.From P. bukoensis HOLTT., IV, V and VI were isolated, in addition to apigenin 7-O-α-L-rhamnoside and kaempferol.The structures of the new compounds were determined by means of spectroscopic methods and chemical transformations.Keywords----Pseudophegopteris hirtirachis; Pseudophegopteris subaurita; Pseudophegopteris bukoensis; Thelypteridaceae; protogenkwanin-type flavonoid; protogenkwanin; acylated glycoside; fern; chemotaxonomy; 13C-NMR
