Zobrazeno 1 - 10
of 23
pro vyhledávání: '"R. I. Evstratova"'
Publikováno v:
Chemistry of Natural Compounds. 28:511-512
Publikováno v:
Pharmaceutical Chemistry Journal. 12:1468-1473
Autor:
V. S. Kabanov, R. I. Evstratova
Publikováno v:
Chemistry of Natural Compounds. 14:608-611
1. A gas-chromatographic method has been developed for the quantitative determination of ledol in the essential oil ofLedum palustre which permits the amount of ledol in the leaves and herbage to be determined. 2. Depending on the vegetation phase an
Publikováno v:
Chemistry of Natural Compounds. 8:450-457
Publikováno v:
Chemistry of Natural Compounds. 9:156-161
Structure (I) is proposed for the new sesquiterpene lactone acroptilin isolated fromAcroptilon repens L. (DC.) andCentaurea hyrcanica Bornm. on the basis of the results of reactions performed and an interpretation of IR, UV, NMR, and mass spectra.
Publikováno v:
Pharmaceutical Chemistry Journal. 3:529-533
Publikováno v:
Chemistry of Natural Compounds. 9:595-599
1. The configuration of the OH group has been determined and the configurations of a number of other protons in the arnifolin molecule have been confirmed by means of the paramagnetically induced PMR spectra.
Publikováno v:
Chemistry of Natural Compounds. 12:272-274
The reaction of pyridine and hydrochloric acid with grosshemin in the presence of acetic anhydride forms a substance with the composition C20H24O4NCl · H2O, mp 160–165°C, [α] 20 D + 71.23 (c 1.33; water), for which structure (II) is proposed.
Publikováno v:
Chemistry of Natural Compounds. 10:752-754
1. FromInula japonica a new sesquiterpene lactone — deacetylinulicin — has been isolated. 2. Spatial formulas have been put forward for inulicin and deacetylinulicin (Ia and Ib, respectively).
Publikováno v:
Chemistry of Natural Compounds. 7:567-569
The mass spectra of arnifolin and [D]arnifolin have been obtained, and the fragmentation of arnifolin under the action of electron impact has been studied.