NMR studies and X-ray crystallography of galdosol 5-methyl ether from Salvia officinalis L. |
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| Authors: | Z. Djarmati R. M. Jankov J. Csanadi A. Djordjević B. Ribar D. Lazar P. Engel |
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| Affiliation: | (1) Technical High School and Institute of Technology !["ldquo"]("/content/hu34732660582870/xlarge8220.gif") Servo Mihalj!["rdquo"]("/content/hu34732660582870/xlarge8221.gif") , 23000 Zrenjanin, P. Drap!["scaron"]("/content/hu34732660582870/xlarge353.gif") ina 15, Yugoslavia;(2) Department of Biochemistry, Faculty of Science, Belgrade, Yugoslavia;(3) Institute of Chemistry, Faculty of Science, Novi Sad, Yugoslavia;(4) Institute of Technology Servo Mihalj, Zrenjanin, Yugoslavia;(5) Academy of Science and Arts of Vojvodina, Novi Sad, Yugoslavia;(6) Instituteof Physics, Faculty of Science, Novi Sad, Yugoslavia;(7) Laboratory for Chemical and Minerological Crystallography, University of Berne, Switzerland |
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| Abstract: | The title compound 2H-10,4a-(epoxy-methano)-phenantren-12-one-l,3,4,9,10,10a-hexahydro-6-hydroxy-5-methoxy-9-keto-1,1-dimethyl-7-(1-methylethyl) isolated fromSalvia officinalis L. have been investigated by nuclear magnetic resonance (NMR) spectroscopy and X-ray analysis. Investigation of1H and13C NMR, homonuclear (COSY) (1H-1H) and heteronuclear (1H-13C) spectra, permitted the unambiguous assignment of the1H and13C spectra, what gave the possibility to resolve the signals of similar natural products. Crystal data are: C21H26O5,Mr=358.43, orthorhombic,P21,21,21, (No. 19),a=10.671(2),b=11.976(3),c=14.601(5)Å,V=1865.9(9)Å3,Z=4,Dx=1.276 mg–3,  (MoK )=0.7107 Å, =0.84 cm–1, F(000)=768,T=293(1) K. The structure was solved by direct methods and refined toR=0.041 for 1832 observed reflections collected on CAD-4 diffractometer. |
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