RESUMEN
A new triterpenoid saponin named gylongiposide I was isolated from the aerial parts of Gynostemma longipes C.Y. Wu. On the basis of chemical evidence and spectral data the structure of gylongiposide I was elucidated as 19-oxo-3 beta, 20(S), 21-trihydroxydammar-24-ene-3-O-([alpha-L-rhamnopyranosy(1-->2)] [beta-D-xylpyranosyl(1-->3)]) alpha-L-arabinopyranoside (G). The known compounds were identified as gypenoside XLIX(F) and ginsenoside Rb1(A).
Asunto(s)
Medicamentos Herbarios Chinos/química , Gynostemma/química , Plantas Medicinales/química , Saponinas/aislamiento & purificación , Triterpenos/aislamiento & purificación , Ginsenósidos , Estructura Molecular , Saponinas/química , Saponinas/farmacología , Triterpenos/químicaRESUMEN
HPLC determination has shown that the content of catapol in Rehmannia glutinosa decreases markedly after being dried and processed. This change of content is related to acidic and alkaline conditions. But in boiling water or saccharide solution no marked changes have been observed.
Asunto(s)
Medicamentos Herbarios Chinos/química , Glucósidos/análisis , Iridoides , Plantas Medicinales/química , Piranos/análisis , Cromatografía Líquida de Alta Presión , Calor , Glucósidos Iridoides , Magnoliopsida/química , Tecnología Farmacéutica/métodosRESUMEN
From the extract of dry roots of Rehmannia glutimosa, fatty acids, palmitic acid, beta-sitosterol, daucosterol and sulfur (Ss) cyclic compound were isolated and identified. The latter four were isolated for the first time.
Asunto(s)
Medicamentos Herbarios Chinos/química , Ácidos Grasos/aislamiento & purificación , Ácidos Palmíticos/aislamiento & purificación , Sitoesteroles/aislamiento & purificación , Ácidos Grasos/química , Ácidos Palmíticos/química , Sitoesteroles/químicaRESUMEN
The acidic constituents in petroleum ether extract of the roots Rehmannia glutinosa f. hueichingensis were fractionated and analyzed by GC-MS. 19 Kinds of acidic constituents were identified and 11 of them (the main components) were compared between Rehmanniae Radix and its processed products.
Asunto(s)
Medicamentos Herbarios Chinos/química , Ácidos Grasos/análisis , CalorRESUMEN
15 kinds of free amino acids were detected in Rehmannia glutinosa and its processed products, it was found that their contents were reduced in processed products.