Quaternary Isoquinoline Alkaloids from Stephania cepharantha.
نویسندگان
چکیده
منابع مشابه
Quaternary isoquinoline alkaloids from Stephania cepharantha.
From the quaternary alkaloidal fraction of the dried tubers of Stephania cepharantha, two new isoquinoline alkaloids, stecepharine and tetradehydroreticuline have been isolated along with the known compounds, magnoflorine, menisperine, steponine, cyclanoline, oblongine, cis-N-methylcapaurine and 2'-N-methylisotetrandrine. cis-N-Methylcapaurine (=9-O-methylstecepharine) was isolated as a natural...
متن کاملCytotoxic bisbenzylisoquinoline alkaloids from Stephania epigaea.
Six new bisbenzylisoquinoline alkaloids (1-6) and seven known compounds (8-14) were isolated from the tubers of Stephania epigaea, in addition to the major alkaloid, cepharanthine (7). The structures of 1-6 were elucidated by combined spectroscopic data analysis and chemical methods, with their configurations determined from their optical rotation values and confirmed using circular dichroism. ...
متن کاملProtoberberine isoquinoline alkaloids from Arcangelisia gusanlung.
HPLC-DAD-directed isolation and purification of the methanol extract of stems of Arcangelisia gusanlung H. S. Lo. led to the isolation of a new protoberberine alkaloid, gusanlung E (1), along with fourteen known derivatives 2-15, seven of which were obtained from the genus Arcangelisia for the first time. The structures and absolute stereochemistry of these compounds were elucidated on the basi...
متن کاملAntimicrobial Alkaloids from the Tubers of Stephania succifera
Chemical investigation of the EtOH extract from the tubers of Stephania succifera collected in Hainan Province of China resulted in the isolation of the two new alkaloids Cepharanone D (1) and N-formyl-asimilobine (2), and a known alkaloid, N-formyl-annonain (3). Their structures were elucidated by spectroscopic techniques (UV, IR, 1D and 2D NMR). The antimicrobial activities of the three compo...
متن کاملIsolation of quaternary alkaloids from Mahonia aquifotium
Five alkaloids were isolated from the underground part of Mahonia aquifolium of domestic origin: magnoflorine, berberine, palmatine, jatrorrhizine, and columbamine. The aerial part of this plant contained only berberine, palmati ne, and jatrorrhizine. The identity of the isolated bases was corroborated by colour reactions in the u.v. light, by i.r. and mass spectra, optical rotation and compar...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 2000
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.48.370