Alkaloids of the Nitraria Genus. Komavine and Acetylkomavine

Two new alkaloids, komavine (1) and acetylkomavine (2) were isolated for the first time from the aerial part ofNitraria komarovii.Their ¹ H and ¹³ C NMR spectra were studied. Komavine was synthesized by condensation of tryptamine with cyclohexanone. These same alkaloids were also isolated fromNitraria schoberi     

N-ALLYLISONITRARINE AND NARCISSIN FROM PLANTS OF THE Nitraria GENUS

The new alkaloid N-allylisonitrarine was isolated from the aerial part ofNitraria schoberiL. Its structure was established using spectral data and chemical transformations. Leaves ofNitraria komaroviicontain the flavonoid narcissin. Its ¹ H and ¹³ C NMR spectra were studied.     

Three New C21 Steroidal Glycosides from the Roots of Cynanchum komarovii Al.Iljinski

Three new C21 steroidal glycosides named komaroside A, komaroside B, komaroside C were isolated from the ethanolic extract of the roots of Cynanchum komarovii Al.Iljinski(Asclepiadaceae), their structures were determined by physiochemical and spectroscopic analysis.     

Alkaloids from Nitraria komarovii. Structures of nitraridine, dihydronitraridine, and tetrahydronitraridine

Three new alkaloids nitraridine (1), dihydronitraridine (2), and tetrahydronitraridine (3) were isolated from the aerial part of Nitraria komarovii. Their structures were established based on chemical transformations and spectral data. The compounds were synthesized. Spectral properties of the komarovine subgroup of alkaloids were discussed. __________ Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 370–372, July–August, 2006.     

Alkaloids from plants of the genus Nitraria

The new alkaloid schobericine was isolated from the aerial part of N. schoberi. The two new alkaloids komaroidine and acetylkomaroidine were isolated from the two Nitraria species N. komarovii and N. schoberi. Their structures were established using spectral data and chemical transformations. Their syntheses were carried out. __________ Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 164–166, March–April, 2006.