| 2 | Author
| G. Falsone, F. Cateni, F. Katusian, H. Wagner, O. Seligmann | Requires cookie* | | Title
| Constituents of Euphorbiaceae, 10. Conun. [1] New Cerebrosides from Euphorbia characias L  | | | Abstract
| G . P ellizer and F. A sa r o D epartm ent o f Chemical Sciences, U niversity o f Trieste, V ia L. Giorgieri 1 Four new cerebrosides C -l-C -4 were isolated from the latex o f Euphorbia characias L. On the basis o f spectral evidences and chem ical reactions they were characterized as (2 S , 3 S , 4 R , 5 R , 6Z)-l-0-(/?-D -glu cop yran osyl)-2N -[(2'R)-2'-h yd roxy-(15'Z)-tetracose-noyl]-6(Z)-octadecene-l,3,4,5-tetraol-2-am ino (C -l), (2 S , 3 S , 4 R , 5 R, 6 Z)-l-0 -(/? -D -g lu co -p y ra n o sy l)-2 N -[(2 'R)-2 'h y d ro x y -(1 7 'Z)-h ex a c o sen o y l]-6 (Z)-o c ta d e c en e-l,3 ,4 ,5 -te tr a o l-2-am ino(C -2),(2S, 3S , 4 R , 5 R, 6Z)-l-0-(/3-D -glucopyranosyl)-2N -[(2'R)-2'-hydroxy-(19'Z)-octacosenoyl]-6-(Z)-octadecene-l,3,4,5-tetraol-2-am ino (C -3) and (2S , 3 S, 4 R , 5 R, 6 Z)-l-0 -(/?-D -glu cop yran o sy l)-2 N -[(2 'R)-2 '-h y d ro x y -o cta co sa n o y l]-6 -(Z)-o cta d ecen e-l, 3,4,5-tetraol-2-amino (C-4). Reversed phase colum n flash chromatography was effective for the isolation of the cere brosides. FA B -M S spectrometry, X H N M R , 13C N M R analysis and chemical reactions were useful in providing information for the structure elucidation. | | |
Reference
| Z. Naturforsch. 48b, 1121 (1993); received March 2 1 9 9 3 | | |
Published
| 1993 | | |
Keywords
| Euphorbiaceae, C erebrosides, Structure Elucidation | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/48/ZNB-1993-48b-1121.pdf | | | Identifier
| ZNB-1993-48b-1121 | | | Volume
| 48 | |
3 | Author
| O. Tto, O. Lfb, Onowara Begum2, Hans Geigerb | Requires cookie* | | Title
| Fluorescence Properties of Hydroxy-and Methoxyflavones and the Effect of Shift Reagents  | | | Abstract
| The fluorescence spectra o f 42 hydroxy-and m ethoxyflavones in m ethanol solution have been investigated. The follow ing findings are considered to be useful in structure elucidation and identification o f flavonoids: (a) The maxima of the absorption and fluorescence bands give, in m ost cases, a unique combination; (b) flavones exhibit exceptionally large Stok es' shifts (6,800 to | | |
Reference
| Z. Naturforsch. 39b, 231 (1984); received Septem ber 23 1983 | | |
Published
| 1984 | | |
Keywords
| Flavonoids, F luorescence, Structure Elucidation, Shift Reagents | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/39/ZNB-1984-39b-0231.pdf | | | Identifier
| ZNB-1984-39b-0231 | | | Volume
| 39 | |
4 | Author
| Atta-Ur -Rahman, S. Farhi, G. A. Miana, Mehrun Nisa, H.E J, Wolfgang Voelter | Requires cookie* | | Title
| The Isolation and Structure of Papilamine, a New Alkaloid from Buxus papilosa  | | | Abstract
| A new alkaloid, papilamine, has been isolated from the leaves of Buxus papilosa to which the structure 1 has been assigned on the basis of chemi-cal and spectroscopic studies. | | |
Reference
| Z. Naturforsch. 40b, 567—568 (1985); received June 28 1984 | | |
Published
| 1985 | | |
Keywords
| Steroidal Alkaloids, Buxus papilosa, Structure Elucidation, Febrifuge, Rheumatism | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/40/ZNB-1985-40b-0567_n.pdf | | | Identifier
| ZNB-1985-40b-0567_n | | | Volume
| 40 | |
6 | Author
| G. M. Ohn, K. Taraz, H. Budzikiewicz, FrauM. Prof, Bäudler | Requires cookie* | | Title
| New Pyoverdin-Type Siderophores from Pseudomonas fluorescens [1]  | | | Abstract
| The structures o f two new pyoverdins (G M -I and G M -II) isolated from the culture medium of Pseudomonas fluorescens have been elucidated by spectroscopic methods and degradation studies. The pyoverdins consist o f a chrom ophore which could be identified as (1 S)-5-amino-2,3-dihydro-8,9-dihydroxy-1 H -pyrim ido[l,2-a]quinoline-l-carboxylic acid substituted at the amino group with a 3-carboxypropanoyl or a succinamoyl residue and at the carboxy group with the N-terminus o f D -A l a -D -L y s —G l y -G ly -D -t h r e o -(O H) A s p -D -G lu -D -S e r — L -A l a -D -A l a -D -A l a -L -A l a -L -N 5-(O H)O rn . According to the "short-hand" nomenclature proposed in [2]*** the two com pounds should be characterized as pyoverdin-Q-akG Gd'qsAaaAO '*-SUCA and pyoverdin-Q-akGG d'qsAaaAO '*-SUC. | | |
Reference
| Z. Naturforsch. 45b, 1437—1450 (1990); received April 26 1990 | | |
Published
| 1990 | | |
Keywords
| Pseudomonas fluorescens, Pyoverdins, Siderophores, Structure Elucidation | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/45/ZNB-1990-45b-1437.pdf | | | Identifier
| ZNB-1990-45b-1437 | | | Volume
| 45 | |
7 | Author
| Viqar Uddin, Ahmad, ZulfiqarA. Li3, Muhammad Shaiq, A. Li3, Fazila Iqbal3, Muhammad Zahid3, RasoolBakhsh Tareenb, H.E J | Requires cookie* | | Title
| Two New Aromatic Constituents from Stocksia brahuica  | | | Abstract
| The methanolic extract of Stocksia brahuica yielded two new aromatic constituents: diphe nylacetic acid and brahene (2',4'-dihydroxy-7-methoxy-4,5-methylenedioxyisoflavene). Their structures were characterized with the help of modern spectroscopic techniques including 2D-NMR. | | |
Reference
| Z. Naturforsch. 54b, 940—942 (1999); received January 2 1999 | | |
Published
| 1999 | | |
Keywords
| Diphenylacetic Acid, Brahene, Sapindaceae, Stocksia brahuica, Structure Elucidation | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/54/ZNB-1999-54b-0940.pdf | | | Identifier
| ZNB-1999-54b-0940 | | | Volume
| 54 | |
8 | Author
| Joachim Heinickea, Attila Dala, Hans-Friedrich Kleinb, Olaf Hetcheb, Ulrich Flörkec, Hans-Jürgen Hauptc | Requires cookie* | | Title
| Formation of r71-P-(2-Phosphinophenol)Ni(0)(PMe3)3 and Oxidation to cjs/fraws-Bis(2-phosphinophenolato)nickel(II) Complexes  | | | Abstract
| o-Phosphinophenols 1 (P ^ O H) react with equimolar amounts of Ni(PMe3)4 at low tempera tures to give yellow Ni(0) complexes such as [(HO~P)Ni(PMe3)3] 2a with only P coordination of the P ^ O H ligand. Oxidation of solutions of 1 and Ni(PMe3)4 by dioxygen leads to brown bis(o-phosphinophenolato-P^O)nickel chelate complexes 3a-d. Structure elucidation by NM R is consistent with a m-square planar geometry for 3a-c and a rrans-square planar solution struc ture of the terr-butylphenylphosphino derivative 3d. The geometric isomers were distinguished by different ranges of phosphorus coordination shifts and 3lP-l3C-2 and 3IP-13C-1 coupling | | |
Reference
| Z. Naturforsch. 54b, 1235—1243 (1999); received May 19 1999 | | |
Published
| 1999 | | |
Keywords
| Phosphinophenolate, Nickel, Complexes, Structure Elucidation, Solid State Structures | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/54/ZNB-1999-54b-1235.pdf | | | Identifier
| ZNB-1999-54b-1235 | | | Volume
| 54 | |
9 | Author
| H.E J | Requires cookie* | | Title
| A tta-ur-Rahm an*, M ehrun Nisa, and Talat Zamir  | | | Abstract
| A new alkaloid, "papilicine", has been isolated from the leaves of Buxus papilosa to which structure (1) has been assigned on the basis of spectroscopic studies. Buxus species have been used in the indigenous system of medicine as febrifuge, for relief of rheumatism and for the treatm ent of a num ber of other ailments. Buxus papilosa C. K. Schn., Linn. | | |
Reference
| (Z. Naturforsch. 39b, 127—128 [1984]; received March 23 1983) | | |
Published
| 1984 | | |
Keywords
| Buxus papilosa, Alkaloids, Structure Elucidation, NMR Spectra, Mass Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/39/ZNB-1984-39b-0127_n.pdf | | | Identifier
| ZNB-1984-39b-0127_n | | | Volume
| 39 | |
11 | Author
| ViqarUddin Ahmad, Q. Najmus-Saqib, K. Usmanghani, W. Fuchs, W. Voelter | Requires cookie* | | Title
| New Triterpenoid from Primula denticulata  | | | Abstract
| From the alcoholic extract of the plant Primula denticulata four main compounds could be isolated by column chromatography: Pri-dentigenin A, B, C and D. Several spectroscopic methods and the synthesis of several derivatives allow to determine the structure of Pridenti-genin B. | | |
Reference
| Z. Naturforsch. 35b, 511—512 (1980); eingegangen am 27. Dezember 1979 | | |
Published
| 1980 | | |
Keywords
| Triterpenoids, Primula denticulata, Structure Elucidation, X H NMR Spectra, 13 C NMR Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/35/ZNB-1980-35b-0511_n.pdf | | | Identifier
| ZNB-1980-35b-0511_n | | | Volume
| 35 | |
12 | Author
| M. Uhammad, Shaiq Ali, Muhammad Saleem, Viqar Uddin, H.E J | Requires cookie* | | Title
| Zatatriol: A New Aromatic Constituent from Zataria multiflora Ahm ad  | | | Abstract
| A new isopropyl benzene derivative named as zatatriol (5) and two synthetically known compounds (2 and 7) having the same skeleton have been isolated from the hexane soluble part of a Lamiaceous plant Zataria multiflora. In addition to 2, 5 and 7, som e known constitu ents: p-cym ene (1), thymol (3), thymol methyl-ether (4) , /3-sitosterol, stigmasterol, oleanolic acid, betulinic acid, and hexadecanoic acid have also been isolated from the same source. Structures of the isolated constituents were elucidated with the aid of NM R spectroscopy. | | |
Reference
| Z. Naturforsch. 54b, 807 (1999); received July 22 1998 | | |
Published
| 1999 | | |
Keywords
| Lamiaceae, Zataria multiflora, Isopropyl Benzene Constituents, Structure Elucidation, N M R Data | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/54/ZNB-1999-54b-0807.pdf | | | Identifier
| ZNB-1999-54b-0807 | | | Volume
| 54 | |
|