| Structure Identification: |
| Planta Med. 2003 Mar;69(3):258-64. | | New dihydrobenzofurans and triterpenoids from roots of Microglossa pyrifolia.[Pubmed: 12677531 ] | From the roots of Microglossa pyrifolia (Lam.) Kuntze (Asteraceae, tribe Astereae), used in East African traditional Medicine to treat a variety of ailments, seven dihydrobenzofurans and seven triterpenoids (five dammaranes and two 28- nor-oleanenes) were isolated.
METHODS AND RESULTS:
Their structures were elucidated by spectroscopic (UV, MS and NMR) means. With the exception of the tremetone derivative 1, all of the dihydrobenzofurans found in this drug possess the rare 6-acetyl-5-hydroxy substitution pattern. Dihydrobenzofurans 1 [methyl 2-(5-acetyl-2,3-dihydrobenzo[beta]furan-2-yl)propenoate(Methyl 2-(5-acetyl-2,3-dihydrobenzofuran-2-yl)propenoate)], 3 (methyl2-(6-acetyl-5-hydroxy-2,3-dihydrobenzofuran-2-yl)propenoate] and 7 (6-acetyl-5-hydroxy-2-(1-hydroxy-2-propenyl)-3-methoxy-2,3-dihydrobenzofuran) as well as the triterpenes 3beta-acetoxy-25-hydroxydammara-20,23-diene ( 9), 3beta-acetoxy-24-oxo-dammara-20,25-diene ( 11), 17beta-hydroxy-3,16-dioxo-28-norolean-12-ene ( 12) and 17beta-hydroxy-3,11,16-trioxo-28-norolean-12-ene ( 13) are new natural products, to the best of our knowledge. |
|
Cell. 2018 Jan 11;172(1-2):249-261.e12. doi: 10.1016/j.cell.2017.12.019.IF=36.216(2019)
Cell Metab. 2020 Mar 3;31(3):534-548.e5. doi: 10.1016/j.cmet.2020.01.002.IF=22.415(2019)
Mol Cell. 2017 Nov 16;68(4):673-685.e6. doi: 10.1016/j.molcel.2017.10.022.IF=14.548(2019)
ACS Nano. 2018 Apr 24;12(4): 3385-3396. doi: 10.1021/acsnano.7b08969.IF=13.903(2019)
Nature Plants. 2016 Dec 22;3: 16206. doi: 10.1038/nplants.2016.205.IF=13.297(2019)
Sci Adv. 2018 Oct 24;4(10): eaat6994. doi: 10.1126/sciadv.aat6994.IF=12.804(2019)