| Structure Identification: |
| Nat Prod Bioprospect. 2015 October; 5(5): 263–270. | | Lanostane-Type Triterpenoids from Scilla scilloides and Structure Revision of Drimiopsin D[Pubmed: 26458926] |
METHODS AND RESULTS:
Two hitherto unknown lanostane-type triterpenoids, namely scillascillol (1) and scillascillone (2), and a hitherto unknown norlanostane-triterpene glycoside, namely scillascilloside B-1 (3), were isolated from the ethanol extract of the whole plants of Scilla scilloides.
CONCLUSIONS:
Their structures were elucidated on the basis of extensive spectroscopic studies. In addition, the structure of Drimiopsin D (6a) has been revised as 2,5-dimethoxy-8-methyl-1,3,6-trihydroxyxanthone (6) by reanalysis of the spectroscopic data. | | J Nat Prod. 2004 Oct;67(10):1726-8. | | Xanthones from Drimiopsis maculata.[Pubmed: 15497949 ] |
METHODS AND RESULTS:
Six new xanthones, drimiopsin A, drimiopsin B, Drimiopsin C, Drimiopsin D, drimiopsin E, drimiopsin F , have been isolated from the South African Drimiopsis maculata.
CONCLUSIONS:
The structures of these compounds were difficult to elucidate due to the lack of correlating protons seen in the NMR spectra, and INADEQUATE spectra were used to confirm the structures. Xanthones have not previously been reported from the Hyacinthaceae. |
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