Protogenkwanin, a new flavonoid from Equisetum arvense L
M Hauteville, J Chopin, H Geiger, L Schuler
Index: Hauteville, Marcelle; Chopin, Jean; Geiger, Hans; Schuler, Lothar Tetrahedron, 1981 , vol. 37, p. 377 - 381
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Citation Number: 16
Abstract
From the fertile sprouts of Equisetum arvense L. have been isolated protogenkwanin 4'- glucoside and gossypitrin. The structure of protogenkwanin as 5-hydroxy-2-(1, 4-dlhydroxy- 2, 5-cyclohexadienyl)-7-methoxy-4-chromenon is proved on the basis of chemical and physical evidence. It is demonstrated that articulatin a thiamine decomposing substance, from E. arvense, is identical with the known flavonol glycoside gossypitrin (= gossypetin-7- ...
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