| Structure Identification: |
| Journal of Natural Products.2002;65(6):856-859. | | New sesquiterpenoids from the root of Guatteria multivenia.[Reference: WebLink] |
METHODS AND RESULTS:
A phytochemical investigation of the CHCl(3) fraction of an ethanol extract of the root of Guatteria multivenia furnished nine compounds, of which four are sesquiterpenes (1-4) and five are alkaloids (5-9). Of the four sesquiterpenes, two are new (1, 3), named guatterin A (1) and dihydromadolin-K (3), and two are known (2, 4), identified as madolin-K (2) and madolin-W (4). The five known alkaloids were identified as liriodenine (5), lysicamine (6), lanuginosine (7), guadiscine (8), and O-Methylpallidine (9).
CONCLUSIONS:
All the known compounds were isolated from this species for the first time. | | J Nat Prod. 2008 Aug;71(8):1376-85. | | Online structural elucidation of alkaloids and other constituents in crude extracts and cultured cells of Nandina domestica by combination of LC-MS/MS, LC-NMR, and LC-CD analyses.[Pubmed: 18671433 ] |
The combination of NMR, MS, and CD data permitted the structural elucidation including the absolute configuration of the known alkaloids and unknown components in the extract matrix solution of Nandina domestica without isolation and sample purification prior to the coupling experiments.
METHODS AND RESULTS:
Unstable natural stereoisomers were identified by LC-NMR and LC-MS. Five known alkaloids, (S)-isoboldine, (S)-domesticine, (S)-nantenine, sinoacutine, and menispermine, were identified from N. domestica. O-Methylpallidine and (E, E)-, (E, Z)-, and (Z, Z)-terrestribisamide were also characterized for the first time from this plant.
CONCLUSIONS:
Known jatrorrhizine, palmatine, and berberine and unknown (R)-carnegine and (E, E)-, (E, Z)-, and (Z, Z)-terrestribisamide were identified in the callus of N. domestica. |
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