90145-56-5Relevant academic research and scientific papers
Chemische und Chemotaxonomische Untersuchungen der Pterophyten. XLV. Chemische Untersuchungen der Inhaltstoffe von Glaphyropteridopsis erubescens (Wall.) Copel.
Tanaka, Nobutoshi,Sada, Takuro,Murakami, Takao,Saiki, Yasuhisa,Chen, Chiu-Ming
, p. 490 - 496 (2007/10/02)
The fronds extracts of Glaphyropteridopsis erubescens (Wall.) Copel. contain besides the already known flavonol glycosides (afzelin and quercitrin) three new flavan-4-ol glycosides, eruberin A(I), B(II) and C(III), which belong to a new type of proanthocyanidin.By means of spectroscopic and chemical methods, the structures 5,7-dihydroxy-4'-methoxy-6,8-dimethyl-2'',4(S)-oxido-2(R)-flavan-5-β-D-glucopyranoside (I), 4(S),5,7-trihydroxy-4'-methoxy-6,8-dimethyl-2(R)-flavan-5,7-O-β-D-diglucopyranoside (II) and 5,7-dihydroxy-4(S),4'-dimethoxy-6,8-dimethyl-2(R)-flavan-5,7-O-β-D-diglucopyranoside (III) are proposed.Eruberin C(III) may be an artifact. Keywords - Glaphyropteridopsis erubescens; fern; Thelypteridaceae; chemotaxonomy; flavan-4-ol glycoside; structure; spectroscopic method; chemical reaction
