In vitro: |
J Nat Prod. 2011 Jan 28;74(1):82-5. | Isolation, structure elucidation, and cytotoxic evaluation of furanonaphthoquinones from in vitro plantlets and cultures of Streptocarpus dunnii.[Pubmed: 21174407] |
METHODS AND RESULTS:
Two new furanonaphthoquinones, (3R)-7-methoxy-α-dunnione (5) and (3R)-6-hydroxy-7-methoxy-α-dunnione (6), along with the known (3R)-dunnione (1), (3R)-α-dunnione (2), (3R)-7-hydroxy-α-dunnione (3), and 1-hydroxy-2-methylanthraquinone (4), were isolated from in vitro cultures of Streptocarpus dunnii. The structures of compounds 5 and 6 were established by spectroscopic means. This is the first report of hydroxylated furanonaphthoquinones in a Streptocarpus species.
CONCLUSIONS:
Compounds 1-3 demonstrated cytotoxic activity against a range of breast cancer and pancreatic tumor cell lines. | Nat Prod Res. 2009;23(14):1322-9. | A new anthraquinone from Morinda citrifolia roots.[Pubmed: 19735047] |
METHODS AND RESULTS:
An investigation of Morinda citrifolia roots afforded a new anthraquinone, 2-ethoxy-1-hydroxyanthraquinone (1), along with five other known anthraquinones: 1-Hydroxy-2-methylanthraquinone (2), damnacanthal (3), nordamnacanthal (4), 2-formyl-1-hydroxyanthraquinone (5) and morindone-6-methyl-ether (6). This is the first report on the isolation of morindone-6-methyl-ether (6) from this plant. The structures of these compounds were elucidated based on spectroscopic analyses such as NMR, MS and IR.
CONCLUSIONS:
Biological evaluation of five pure compounds and all the extracts against the larvae of Aedes aegypti indicated 1-Hydroxy-2-methylanthraquinone (2) and damnacanthal (3) were the extracts to exhibit promising larvicidal activities. |
|