نتایج جستجو برای: cycloartane triterpenoids

تعداد نتایج: 1871  

Journal: :Journal of natural products 2011
Ki Hyun Kim Sang Un Choi Young Choong Kim Kang Ro Lee

Twelve new tirucallane triterpenoids, named cornusalterins A-L (1-12), and two known tirucallane triterpenoids, deoxyflindissone (13) and (-)-leucophyllone (14), were isolated from a MeOH extract of stems and stem bark of Cornus walteri. The structures of the new compounds were determined by spectroscopic methods, including 1D and 2D NMR analyses. Compounds 12 and 13, possessing a tetrahydrofur...

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2006
Jie Liu Kuniyoshi Shimizu Fumiko Konishi Kiyoshi Noda Shoichiro Kumamoto Kenji Kurashiki Ryuichiro Kondo

The ethanol extract of Ganoderma lucidum showed inhibitory activity on both isozymes (types 1 and 2) of 5a-reductase and suppression effects of ventral prostate growth induced by testosterone in castrated rat, but not induced by dihydrotestosterone. Activity-guided fractionation and TLC analysis suggested that the active principles in vivo were triterpenoids. These results indicate that the tri...

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Journal: :Chemical and Pharmaceutical Bulletin 2006

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Journal: :Molecules 2013
Reiko Tanaka Takashi Kikuchi Saori Nakasuji Yasuhiro Ue Daisuke Shuto Keishi Igarashi Rina Okada Takeshi Yamada

Three novel multiflorane-type triterpenoids, 3α-p-nitrobenzoylmultiflora-7:9(11)-diene-29-benzoate (1), 3α-acetoxymultiflora-7:9(11)-diene-29-benzoate (2), and 3α-acetoxymultiflora-5(6):7:9(11)-triene-29-benzoate (3), along with two known related compounds 4 and 5 were isolated from the seeds of zucchini (Cucurbita pepo L). Their structures were determined on the basis of 1D and 2D NMR spectros...

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Journal: :iranian journal of basic medical sciences 0
ali rezaei-golmisheh department of histology and embryology, faculty of veterinary medicine, urmia university, urmia, iran hassan malekinejad department of pharmacology and toxicology, faculty of veterinary medicine, urmia university, urmia, iran department of pharmacology and toxicology, faculty of pharmacy, urmia medical university of sciences, urmia, iran siamak asri-rezaei department of clinical sciences, faculty of veterinary medicine, urmia university, urmia, iran amir abbas farshid department of pathology, faculty of veterinary medicine, urmia university, urmia, iran peyman akbari division of veterinary pharmacy, pharmacology and toxicology, faculty of science, utrecht university, the netherlands

objective(s):the current study was aimed to determine the bioactive constituents and biological effects of the crataegus monogyna ethanolic extracts from bark, leaves and berries on hypercholesterolemia. materials and methods: oleanolic acid, ursolic acid, quercetin and lupeol concentrations were quantified by hplc. total phenol content and radical scavenging activity of extracts were also meas...

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2017
Karel Miettinen Jacob Pollier Dieter Buyst Philipp Arendt René Csuk Sven Sommerwerk Tessa Moses Jan Mertens Prashant D Sonawane Laurens Pauwels Asaph Aharoni José Martins David R Nelson Alain Goossens

Triterpenoids are widespread bioactive plant defence compounds with potential use as pharmaceuticals, pesticides and other high-value products. Enzymes belonging to the cytochrome P450 family have an essential role in creating the immense structural diversity of triterpenoids across the plant kingdom. However, for many triterpenoid oxidation reactions, the corresponding enzyme remains unknown. ...

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Journal: :Journal of natural products 2007
Sara Hoet Luc Pieters Giulio G Muccioli Jean-Louis Habib-Jiwan Fred R Opperdoes Joëlle Quetin-Leclercq

Fractionation of an antitrypanosomal lipophilic leaf extract from Strychnos spinosa led to the isolation of eight triterpenoids and sterols in this plant part for the first time. Two of these were found to possess in vitro antitrypanosomal activity, namely, saringosterol (14) and 24-hydroperoxy-24-vinylcholesterol (15), with IC(50) values of 7.8 +/- 1.2 and 3.2 +/- 1.2 microM, respectively. The...

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Journal: :Chemical and Pharmaceutical Bulletin 2011

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Journal: :Chemical and Pharmaceutical Bulletin 2000

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Journal: :Journal of Natural Products 2003

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