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A new coumarin, pranferol, from the roots ofPrangos ferulacea
- G. A. Kuznetsova, A. Z. Abyshev, M. E. Perel'son, Y. Sheinker, G. Y. Pek
- BusinessChemistry of Natural Compounds
- 1 September 1966
SummaryA new coumarin, pranferol C16H16O5, has been isolated from the roots ofPrangos ferulacea (L.) Lindl.The structure 5-(2′-hydroxy-3′-methylbutoxy)furo-2′,3′:7,6-coumarin has been proposed for…
The structure of agasyllin
- G. K. Nikonov, G. Y. Pek, V. Vandyshev
- ChemistryChemistry of Natural Compounds
- 1 March 1969
On the basis of its physicochemical constants, IR spectrum, and the products of alkaline cleavage, compound I has been identified as 4" acetoxy2 ' . 2' -dimethyl-8 ' -(1" -methylbutyryloxy)-3' , 4'…
The structure of peucenol (peumorisin)—A new hydroxycoumarin
- Y. Sheinker, G. K. Nikonov, V. Zaikin
- ChemistryChemistry of Natural Compounds
- 1 September 1969
ConclusionsOn the basis of a spectroscopic study of peucenol (peumorisin) and the product of its cyclization, it has been established that peucenol is either…
Anomalin, a new natural pyranocoumarin
- E. B. Zorin, G. K. Nikonov, G. Y. Pek
- ChemistryChemistry of Natural Compounds
- 2005
SummaryA new coumarin C24H26O7, which we have calledanomalin has been isolated from the roots ofAngelica anomala Avé-Lall. On the basis of its chemical properties, the results of a study of its…
NMR spectroscopy of H1 of penicillins and their derivatives
- G. Y. Pek, V. Bystrov, E. Kleiner, I. N. Blinova, A. Khokhlov
- Chemistry
- 1 October 1968
1.
On the basis of the NMR-H1 spectra of methyl esters of benzyl- and phenoxymethylpenicillins, cloxacillin, and methicillin, as well as a number of C(3) derivatives of benzyl- and…
Ostruthol fromXanthogallum purpurascens
- G. K. Nikonov, Zh. A. Manaeva, G. Y. Pek
- ChemistryChemistry of Natural Compounds
- 1 September 1966
The pigment was isolated by Brockmann's method [4, 5]. 4. 2 kg of the roots was extracted twice with petroleum ether (bp 40°-70 ° C) in a ratio of 1 : 6 for 18 hr. The red extracts were combined and…
NMR-H1 spectroscopy of penicillins and their derivatives: Communication 2. Influence of the concentration on the parameters of the spectra of methyl esters of benzyl- and phenoxymethylpenicillins
- G. Y. Pek, V. Bystrov, I. N. Blinova
- Chemistry
- 1971
NMR-H1 spectroscopy of penicillins and their derivatives: Communication 4. Influence of solvents on the chemical shifts of methyl esters of benzyl- and phenoxymethylpenicillin
- G. Y. Pek, V. Bystrov, I. N. Blinova
- Chemistry
- 1 August 1971
Reasons for Structure-Acid Resistance Correlation in Series of Substituted Phenylpenicillins
- M. V. Solovskii, G. Y. Pek
- Chemistry
- 1 February 2002
The kinetics of acid hydrolysis of phenylpenicillins substituted in the benzene ring were studied at pH 3.0 and temperatures of 20, 25, and 30°C. A Hammett correlation analysis of the reaction was…
Olivomycin and related antibiotics
- Y. Berlin, I. Vasina, M. Kolosov, G. Y. Pek, L. A. Piotrovich, O. A. Chuprunova
- ChemistryChemistry of Natural Compounds
- 1 July 1969
ConclusionsOn the basis of its chemical properties and spectral characteristics, structure I has been established for the aglycone of the olivomycin antibiotics, olivin.
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