Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Raymond Zelnik"'
Autor:
Raymond Zelnik, Amabile K. Matida, Jayme Antonio Aboin Sertié, Aulus Conrado Basile, S Panizza
Publikováno v:
Planta Medica. 56:36-40
The 5-hydroxy-3,6,7,3',4'-pentamethoxyflavone (artemetin) from Cordia verbenacea DC (Boraginaceae) showed marked anti-inflammatory activity using various experimental models in rats. Artemetin significantly inhibited carrageenin-induced paw edema fol
Publikováno v:
Tetrahedron. 33:1457-1467
The structure of three diterpenoids from Coleus barbatus , Bentham (Labiatae) having a spirocyclopropyl side chain have been determined: they are barbatusin ( 1a ), 3β-hydroxy-3-deoxybarbatusin ( 2 ) and cyclobutatusin ( 3a ). The structures of 1a a
Publikováno v:
Helvetica Chimica Acta. 66:780-788
Dehydration of abiet-8-ene-7β, 13β-diol (ibozol, 1) leads to abieta-7,9(11)-dien-13β-ol (2) which aromatizes slowly to the known abieta-8,11,13-triene (3). Photosensitized oxygenation of the heteroannular diene 2 yields a mixture from which three
Publikováno v:
Tetrahedron. 31:333-339
From Cabralea eichleriana DC. (Meliaceae) nine compounds having a dammarane skeleton have been isolated and identified. They are cabraleone 2, ocotillone 3, cabraleadiol 4a, cabralealactone 5, cabraleahydroxylactone 6a, eichlerianic acid 7a, shoreic
Publikováno v:
Phytochemistry. 14:1071-1075
From Cabralea eichleriana seeds, the following compounds have been isolated: cabraleone, cabraleadiol, fissinolide, 3-deacetylfissinolide, gedunin, 7-deacetoxy-7-oxygedunin, 7-deacetoxy-7-hyd-roxygedunin, methyl angolensate, and three new compounds,
Publikováno v:
Tetrahedron. 26:219-226
Three new bicyclononanolides: angustinolide (I), angustidienolide (IIa) and 2α-hydroxyangusudienolide (III) isolated from Cedrela angustifolia have been identified. Their respective structures were determined by spectroscopic means and chemical tran
Autor:
Raymond Zelnik, Carmen M. Rosito
Publikováno v:
Tetrahedron Letters. 7:6441-6444
Publikováno v:
Tetrahedron. 35:2693-2695
The structure of the hydrogenation product of barbatusin, a diterpenoid from Coleus barbatus Bentham has been revised on the basis of NMR and X-ray data. A geminal coupling of unusually high magnitude has been observed and analysed.
Autor:
Iain C. Paul, David Lavie, Vicente G. Toscano, Raymond Zelnik, Roberto R. DaSilva, Joyce A. McMillan
Publikováno v:
The Journal of Organic Chemistry. 42:923-925
Autor:
Ema Rabenhorst, Amabile K. Matida, Silvio Panizza, Raymond Zelnik, David Lavie, Hugo E. Gottlieb
Publikováno v:
Phytochemistry. 17:1795-1797