Results 171 to 180 of about 5,071 (202)
Some of the next articles are maybe not open access.
Alkaloids of peruvian Uncaria tomentosa
Phytochemistry, 1997Sixteen plants of Uncaria tomentosa were investigated for their alkaloid content and the alkaloid distribution in various parts of the plant was examined. Two chemical types were identified. Seventeen alkaloids were detected and a seasonal variation in the alkaloid content was observed.
Gerhard Laus +2 more
openaire +1 more source
[Steroids from Uncaria rhynchophylla].
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2022Thirteen steroids(1-13) were isolated from the non-alkaloid constituents of Uncaria rhynchophylla by column chromatography on silica gel, ODS, Sephadex LH-20, and preparative HPLC chromatography, and their structures were elucidated by analyses of the MS and NMR spectral data.
Xin-Yu, Liu +4 more
openaire +1 more source
Uncaria rhynchophylla (Miq.) Jacks.
1992Gouteng, Ramulus Uncariae cum Uncis, is the dry branches bearing hooks of Uncaria rhynchophylla (Miq.) Jacks., U. macrophylla Wall., U. hirsuta Havil., U. sinensis (Oliv.) Havil., or U. sessilifructus Roxb. (Rubiaceae), which are collected in the fall and winter.
Weici Tang, Gerhard Eisenbrand
openaire +1 more source
Chemical Constituents of Uncaria rhynchophylla
Chemistry of Natural Compounds, 2022Yaowen Zhang +3 more
openaire +1 more source
Minor triterpenes from an aqueous extract of the hook-bearing stem of Uncaria rhynchophylla
Journal of Asian Natural Products Research, 2021Tiantai Zhang, Jian-Gong Shi, Hua Sun
exaly
Alkaloids of uncaria attenuata Korth
Heteroyohimbine and oxindole alkaloids have been isolated from the leaves of Uncaria attenuate Korth. (Rubiaceae) by means of column chromatography. The isolated heteroyohimbines are tetrahydroalstonine, and rauniticine which has never been reported as being present in this genus before.openaire +1 more source