Results 171 to 180 of about 7,965 (217)
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Oripavine - A New Opium Alkaloid
Planta Medica, 1983Oripavine was isolated from the dried capsules of a variety of PAPAVER SOMNIFERUM cultivated on Tasmania.
B, Nielsen +2 more
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Opium alkaloids V. Structure of porphyroxine
Journal of Pharmaceutical Sciences, 1967Porphyroxine is a monophenolic alkaloid isolated from opium. It contains a methyl acetal group and has three asymmetric centers. The position of the phenolic hydroxyl group has been determined by NMR spectroscopy. Evidence has been presented for the configuration at position-14.
E, Brochmann-Hanssen, K, Hirai
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Opium alkaloids IV. Isolation of isoboldine
Journal of Pharmaceutical Sciences, 1967The aporphine alkaloid isoboldine has been isolated from opium. It has been identified by NMR and mass spectrometry and by comparison of its infrared spectrum with that of synthetic (±)-isoboldine. ORD measurements have shown that the isolated alkaloid has the absolute configuration corresponding to the ( S )-series.
E, Brochmann-Hanssen +2 more
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Opium Alkaloids XV: Isolation of Stepholidine
Journal of Pharmaceutical Sciences, 1975A protoberberine alkaloid was isolated from opium and characterized as (-) 2, 10-dihydroxy-3,9-dimethoxytetrahydroprotoberberine by spectroscopic methods and by comparison with (-) stepholidine.
E, Brochmann-Hanssen, W J, Richter
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Analysis of alkaloids in opium
Journal of Chromatography A, 1984Abstract A rapid analytical procedure for the separation and quantification of the major alkaloids of opium is reported. Separation was effected by Celite column chromatography. Codeine, thebaine, papaverine, and noscapine were eluted in one fraction with an ether—light petroleum (b.p.
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Polybuffer separation of opium alkaloids
Pharmaceutical Chemistry Journal, 1967The methods of polybuffer separation have been applied to the opium alkaloids and from this a method has been developed for separating the following alkaloids from an alcoholic ammoniacal opium mother liquor: morphine, codeine, thebaine, and papaverine.
L. I. Brutko, L. M. Utkin
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Opium Alkaloids X: Biosynthesis of 1-Benzylisoquinolines
Journal of Pharmaceutical Sciences, 1971Radioactively labeled norreticuline was incorporated into papaverine in Papaver somniferum to an extent of about 5% without prior demethylation to norlaudanosoline. 1,2-Dehydronorreticuline does not participate in the biosynthesis of this alkaloid. (+)-Laudanosine is derived from (+)-reticuline via (+)-laudanidine, while (+)-codamine plays only a minor
E, Brochmann-Hanssen +3 more
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GLC Determination of Opium Alkaloids in Papaveretum
Journal of Pharmaceutical Sciences, 1977A GLC method for the determination of the opium alkaloids in papaveretum, based on the formation of the acetyl derivatives of morphine and codeine, is described. The analytical results are compared with those obtained by the official method. The proposed method is fast and accurate and is particularly suited to the analysis of the raw material.
G, Fisher, R, Gillard
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