Browsing by Author "Tesfaye, Tamrat"
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Item Phytochemical Investigation on the Pet-Ether Extractsof the Aerial Parts of Laggera Tomentosa(Addis Ababa Universty, 2009-07) Tesfaye, Tamrat; Asfaw, Nigist (PhD)Phytochemical investigation on the pet-ether extract of the aerial parts of Laggera tomentosa afforded two eudesmane derivatives, 4α-acetoxy-3α-angeloyloxy-7,11-dehydroeudesman- 8-one and 4 α -acetoxy-3 α-(2’,3’-epoxy-2’-methylbutyrate)-11-hydrroxy- 6,7-dehydro-eudesman-8-one. 4α-acetoxy-3α-ang-eloyloxy-7,11-dehydroeu- desman-8- one has been isolated before from L. tomentosa and Bluma alata. 4α-acetoxy-3α-(2’,3’- epoxy-2’-methylbutyrate)-11-hydroxy-6,7-dehydro-eudesman-8-one has been isolated before from Pluchea odorata but not isolated from Laggera tomentosa. Their structures have been established by spectroscopic means.