منابع مشابه
Synthesis of the C1-C21 (C1'-C21') fragment of the dimeric polyketide natural product SCH 351448.
[structure: see text] A convergent, stereoselective assembly of the C1-C21 (C1'-C21') fragment of SCH 351448, a 28-membered bis-lactone natural product, has been developed. A highly efficient approach to this fragment assembles 75% of the carbon skeleton and all the stereochemical elements present in the natural product. In addition, an interesting boron ligand effect on the diastereoselectivit...
متن کاملC21 steroidal glycosides from the roots of Cynanchum paniculatum.
As a part of our continuing research for bioactive constituents from Cynanchum plants, four new C21 steroidal glycosides, cynapanoside D-G (1-4), together with six known compounds (5-10) were isolated from the roots of Cynanchum paniculatum (Bge.) Kitag. Their structures were elucidated on the basis of 1D- and 2D-NMR spectroscopic data as well as HR-ESI-MS analysis. Compound 8 exhibited potent ...
متن کاملPhytochemical Screening of Caralluma lasiantha Isolation of C21 Pregnane Steroid
Phytochemical screening of Caralluma lasiantha was carried out and one C21 pregnane steroid was isolated from chloroform extract. Based on spectroscopic studies (IR, 1H NMR, 13C NMR and ESI-MS) the isolated compound is 3b,14b-dihydroxy-14b-pregn-5-en-20-one which was earlier isolated from other species.
متن کاملKorean Red Ginseng Up-regulates C21-Steroid Hormone Metabolism via Cyp11a1 Gene in Senescent Rat Testes
Ginseng (Panax ginseng Meyer) has been shown to have anti-aging effects in animal and clinical studies. However, the molecular mechanisms by which ginseng exerts these effects remain unknown. Here, the anti-aging effect of Korean red ginseng (KRG) in rat testes was examined by system biology analysis. KRG water extract prepared in feed pellets was administered orally into 12 month old rats for ...
متن کاملMetabolic effects of C21 steroids in female Epinephelus akaara (Teleostei: Serranidae).
Cortisol, 11-deoxycorticosterone, progesterone, 17 alpha-hydroxy-progesterone, 17 alpha-hydroxy-20 beta-dihydroprogesterone, or a combination of the last 2 steroids, were injected into different groups of immature female Epinephelus. None of the steroids tested had significant effects on serum electrolyte level, and hepatosomatic and gonadosomatic indices. Serum glucose concentration was elevat...
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ژورنال
عنوان ژورنال: Arthropod Management Tests
سال: 2012
ISSN: 2155-9856
DOI: 10.4182/amt.2012.c21