The chloroform extract of Asclepias syriaca stem were investigated. Three triterpenes were isolated by TLC, VLC, and preparative chromatography, and their structures established by one and two-dimensional NMR spectroscopy. Lupenyl acetate has been isolated for the first time from A. syriaca; this is the first representative of a triterpene bearing a lupane skeleton in this species. In addition, α-amyrin acetate and α-amyrin butyrate were isolated.
KowalewskiZ, DrostK. (1966) Chromatographic research of alkaloids in the roots and leaves of Asclepias syriaca. Farmaceutyczne, Poznańskie Towarzystwo Przyjaciół Nauk, 5, 75–83.
3.
SikorskaM, MatlawskaI, GlowniakKG. (2000) Qualitative and quantitative analysis of phenolic acids in Asclepias syriaca L. Acta Poloniae Pharmaceutica, 57, 69–72
4.
(a)TothL, MakayZs, MinkerE, KoltaiM, NovakI, SzendreiK., (1970) Isolation and identification of the components in Asclepias syriaca. Herba Hungarica, 9, 49–55;
SikorskaM, MatlawskaI. (2000) Quercetin and its glycoside in the flowers of Asclepias syriaca L. Acta Poloniae Pharmaceutica, 57, 321–324;
7.
SkorskaM, MatlawskaI. (2001) Kaempferol and its glycoside in the seed hair of Asclepias syriaca L. Acta Poloniae Pharmaceutica, 58, 211–215;
8.
SikorskaM, MatlawskaI. (2001) Kaempferol, isorhamnetin and their glycosides in the flowers of Asclepias syriaca LActa Poloniae Pharmaceutica, 58, 269–272.
9.
(a)MaslerL, BauerS, BauerovaO, SikiD., (1962) Cardiac glycoside from Asclepias syriaca L. Isolation of cardiac active steroids, Collection of Czechoslovak Chemical Communication, 27, 872–881;
10.
CellariusHJ, ZechnerL. (1967) Glycosidic components of Asclepias syriaca roots. Scientia Pharmaceutica, 35, 123–56;
11.
BrownP, von EuwJ, ReichsteinT, StoeckelK, WatsonTR. (1979) Cardenolides of Asclepias syriaca L., probable structure of syrioside and syriobioside. Helvetica Chimica Acta, 62, 412–441;
12.
SeiberJN, BrowerLP, LeeSM, McChesneyMM, CheungHTA, NelsonCJ, WatsonTR. (1986) Cardenolide connection between overwintering monarch butterflies from Mexico and their larval food plant, Asclepias syriaca. Journal of Chemical Ecology, 12, 1157–1170;
13.
O'KuruH, RogersE, AbbothTP. (1997) Cardenolide analysis of cold-pressed milkweed oil. Industrial Crops and Products, 7, 53–58;
14.
WarashinaT, NoroT. (2003) Cardenolides from Asclepias syriaca L. Natural Medicines (Tokyo, Japan), 57, 185–188.
15.
(a)van RomburghP, CohenNH. (1905) Occurrence of α-amyrin acetate in some varieties of gutta-percha. Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, 8, 544–546;
16.
SchmidL, LudwigE. (1927) Two sterol-like compounds from Asclepias syriaca. II. Monatshefte fuer Chemie, 48, 577–583;
17.
RheineckAE. (1939) A phytochemical study of Asclepias syrica L. Pharmaceutical Archives, 10, 93–96;
18.
AdamsRP, Spencer TombA, PriceSC. (1987) Investigation of hybridization between Asclepias speciosa and Asclepias syriaca using alkanes, fatty acids and triterpenoids. Biochemical Systematics and Ecology, 15, 395–399.
19.
(a)PapayV, TothL, NovakI, FarkasM., (1973) Substances of the root of Asclepias syriaca. Herba Hungarica, 12, 115–117;
20.
WarashinaT, NoroT. (2009) Acylated-oxypregnane glycosides from the roots of Asclepias syriaca. Chemical & Pharmaceutical Bulletin, 57, 177–184.
21.
(a)BudincevicM, VrbaskiZ, TurkulovJ, DimicE., (1995) Antioxidative activity of extracts of plants on feed fats. Fett Wissenschaft Technologie, 97, 461–466;
22.
PuhacaBS, AdamovJM, Vojinovic-MiloradovM. (2000). Antioxidative activity of plant extracts (Asclepias syriaca L., Astragalus onobrychis L., Chenopodium amrosiodes L.) in preventing autoxidative changes in the environment. International Symposium & Exhibition on Environmental Contamination in Central & Eastern Europe, Proceedings, 5th, Prague, Czech Republic, Sept.12-14, 1498-1513b.
23.
(a)RotinbergP, KelemenS, NutaV, BulacovschiJ., (1995) Antitumor effectiveness dependence of the PA2III and PA3 polyphenolic preparations or their therapeutic doses. Revue Roumanie de Biologie, serie de Biologie Animale, 40, 105–110;
24.
RotinbergP, NutaV, KelemenS, PetrisincuD, RotinbergH. (1998) Reactivity of HeLa tumoral cells under the in vitro action of some aromatic compounds from the phytomass. Romanian Journal of Physiology, 35, 91–98.
25.
HegnauerR. (1964, 1989) Chemotaxonomie der Pflanzen, 3 & 6: Birkhäuser Verlag, Basel, Boston, Berlin
