Results 31 to 40 of about 5,436 (188)

PHYTOCHEMICAL STUDIES ON ASTER SQUAMATUS L. PART II: Sesquiterpene Lactones, Triterpenes and Sterols Present in the Flowers [PDF]

Bulletin of Pharmaceutical Sciences. Assiut University, 1984
Two sesquiterpene lactones santamarin and reynosin were isolated from the flowers of A. squamatus L. In addition a-and β-amyrin, ursolic acid, a mixture of stigmasterol, campesterol and b-sitosterol and an unidentified sesquiterpene lactone were isolated
S. El-Sayyad, H. Sayed, S. Ross
doaj   +1 more source

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, EarlyView.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

Sesquiterpenes Lactones and Flavonoids from (Asteraceae)

Natural Product Communications, 2010
Two new sesquiterpene lactones 8α-(2’,3’-dihydroxy-2’-methylbutanoyl)-15-desoxygoyazensolide and 16α-(1’,2’-dihydroxy-1’-methylpropyl)-eremantholide have been identified as constituents of Eremanthus argenteus aerial parts.
Humberto Takeshi Sakamoto, Eugênio Paceli Laudares, Antônio Eduardo Miller Crotti, Norberto Peporine Lopes, Walter Vichnewski, João Luis Callegari Lopes, Vladimir Constantino Gomes Heleno   +6 more
doaj   +1 more source

Dehydrobrachylaenolide: an eudesmane-type sesquiterpene lactone [PDF]

Acta Crystallographica Section E Structure Reports Online, 2008
The three-ring eudesmanolide, C(15)H(16)O(3), is a natural product isolated from Dicoma anomala Sond. (Asteraceae). The compound contains an endo-exo cross conjugated methyl-enecyclo-hexenone ring with an envelope conformation trans-fused with cyclo-hexane and trans-annelated with an α-methyl-ene γ-lactone.
Rademeyer, Melanie, Van Heerden, Fanie R., Van der Merwe, Marina M.   +2 more
openaire   +4 more sources

Review of phytochemical and antioxidant properties of Ethiopian medicinal plants

JSFA reports, EarlyView.
Abstract Ethiopia possesses a rich ethnobotanical heritage and diverse medicinal flora that play an important role in traditional healthcare. Many Ethiopian medicinal plants contain bioactive phytochemicals with potential antioxidant properties. This capital of indigenous knowledge has contributed to the documentation of different medicinal plants that
Endalamaw Yihune, Amare Bitew Mekonnen, Getahun Yemata   +2 more
wiley   +1 more source

Sesquiterpene Lactones from

Natural Product Communications, 2010
Inula oculus-christi L. (Compositae) extract was chromatographed and three sesquiterpene lactones ergolide, gaillardin and pulchellin C were isolated. The structures of these compounds were determined by analysis of their spectroscopic data, and their ...
Mahmoud Mosaddegh, Maryam Hamzeloo Moghadam, Saeedeh Ghafari, Farzaneh Naghibi, Seyed Nasser Ostad, Roger W. Read   +5 more
doaj   +1 more source

Integrated phytochemical and bioactivity profiling of Xanthium strumarium fruits from Korea and China: Implications for origin‐specific quality specification

Journal of the Science of Food and Agriculture, EarlyView.
Abstract BACKGROUND Geographic origin influences the phytochemical composition and biological activities of medicinal plant resources. Xanthium strumarium L. (XS) fruit is widely used in East Asian traditional medicine. However, current pharmacopeial standards primarily recognize Chinese‐derived material, despite the availability and traditional use of
Eunsu Song, Seung‐Min Oh, Jiyeon Chun, Jinah Hwang   +3 more
wiley   +1 more source

Cytotoxic sesquiterpene lactones from the aerial parts of Inula aucheriana.

Anais da Academia Brasileira de Ciências, 2015
Inula aucheriana DC is a member of the family Asteraceae which is known to produce cytotoxic secondary metabolites noted as sesquiterpene lactones. In the present study, sesquiterpene lactones inuchinenolide B, 6-deoxychamissonolide (stevin) and 14 ...
Ahmad Reza Gohari, Mahmoud Mosaddegh, Farzaneh Naghibi, Bahara Eslami-Tehrani, Atefeh Pirani, Maryam Hamzeloo-Moghadam, Roger W. Read   +6 more
doaj   +1 more source

Dehydroleucodin: a guaiane-type sesquiterpene lactone [PDF]

Acta Crystallographica Section E Structure Reports Online, 2011
Dehydro-leucodin [systematic name: (1S,6S,2R)-9,13-dimeth-yl-5-methyl-ene-3-oxatricyclo-[8.3.0.0(2,6)]trideca-9,12-diene-4,11-dione], C(15)H(16)O(3), is a guanolide isolated from Artemisia douglasiana. The fused-ring system contains a seven-membered ring that adopts a chair conformation, a fused planar cyclo-pentenone ring and a five-membered lactone ...
Priesta, Horacio A., Abboud, Khalil A., Velandia, Alvaro, Lopez, Luis A., Barbieri, Manuel Alejandro   +4 more
openaire   +4 more sources

Unsaturated biobased polyesters from bicyclic α‐pinene‐based diols

Polymer International, EarlyView.
We present the synthesis of four biosourced unsaturated polyesters made from chiral terpene‐based diols and esters of renewable diacids. The resulting materials harbor a bicyclic pinene ring in their backbones which leads to enhanced thermal properties while still conferring susceptibility to enzyme hydrolysis for chains having a cis alkene.
Ganapathy Ranjani, Shengwei Sun, Erik Sundén, Diana Bernin, Per‐Olof Syrén   +4 more
wiley   +1 more source