Pyrrolidinooxazolidine alkaloids from two species of ladybird beetles

Journal of Natural Products

Volumn 60, Issue 8, 1997, Pages 755-759

  Radford, Peter ^a   Attygalle, Athula B ^a   Meinwald, Jerrold ^a   Smedley, Scott R ^b   Eisner, Thomas ^b  

^a Department of Molecular Biology and Genetics   (United States)

^b Department of Obstetrics Gynecology   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ALKALOID; BICYCLO COMPOUND; OXAZOLIDINE DERIVATIVE; PYRROLIDINE DERIVATIVE;

ANIMAL TISSUE; ARTICLE; BEETLE; CHEMICAL STRUCTURE; EXTRACTION; GAS CHROMATOGRAPHY; HEMOLYMPH; HOST RESISTANCE; INFRARED SPECTROMETRY; MALE; MASS SPECTROMETRY; NONHUMAN; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; PREDATION; SPECIES; ANIMAL; CHEMISTRY; ISOLATION AND PURIFICATION; SPECTROSCOPY;

ALKALOIDS; ANIMALS; BEETLES; CHROMATOGRAPHY, GAS; MALE; SPECTRUM ANALYSIS;

EID: 0030609858     PISSN: 01633864     EISSN: None     Source Type: Journal    
DOI: 10.1021/np970140v     Document Type: Article

References (19)

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19. - deuterons over a period of weeks; the δ 1.85 proton exchanging faster than that at δ 2.10. This process presumably results from reversible opening of the oxazolidine ring to give the N-hydroxyethyliminium ion, followed by loss of either C-7 proton to give the corresponding enamine. We observed the base peak m/z 112 to decrease gradually and the peaks at m/z 113 and 114 to increase gradually as deuterium exchange took place.