Results 161 to 170 of about 199,014 (221)

Oripavine - A New Opium Alkaloid

Planta Medica, 1983
Oripavine was isolated from the dried capsules of a variety of PAPAVER SOMNIFERUM cultivated on Tasmania.
B, Nielsen, J, Röe, E, Brochmann-Hanssen   +2 more
openaire   +2 more sources

Assay for Opium Alkaloids

2016
Jelena Acevska, Gjoshe Stefkov, Svetlana Kulevanova, Aneta Dimitrovska   +3 more
openaire   +2 more sources

Spectrophotometric Determination of the Principal Alkaloids of Opium

Journal of the American Pharmaceutical Association (Scientific ed.), 1955
The spectra of four opium alkaloids; narceine, narcotine, papaverine, and thebaine with its acid decomposition products, were determined at various p H values. A method of assay for samples of opium concentrates is proposed that requires less time and a smaller sample than the existing methods.
M S, DYER, A J, McBAY
openaire   +2 more sources

Analysis of alkaloids in opium

Journal of Chromatography A, 1984
Abstract 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.
openaire   +1 more source

Opium alkaloids V. Structure of porphyroxine

Journal of Pharmaceutical Sciences, 1967
Porphyroxine 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
openaire   +2 more sources

Opium alkaloids IV. Isolation of isoboldine

Journal of Pharmaceutical Sciences, 1967
The 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, B, Nielsen, K, Hirai   +2 more
openaire   +2 more sources

Opium Alkaloids XV: Isolation of Stepholidine

Journal of Pharmaceutical Sciences, 1975
A 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
openaire   +2 more sources

A study of the alkaloids of Kirghiz opium

Chemistry of Natural Compounds, 1970
Morphine, codeine, narcotine, thebaine, papaverine, protopine, xanthaline, prophyroxine, bases with mp 267 and 263°C,l-canadine, and cryptopine have been isolated from Kirghiz opium.
I. A. Bessonova, Z. Sh. Faizutdinova, S. Yu. Yunusov   +2 more
openaire   +1 more source

Functionalized carbon nanotube-polyaniline composite coating for on-line microextraction on a screw coupled with high performance liquid chromatography to determine opium alkaloids

Microchimica Acta, 2023
Payam Osooli, Y. Yamini, Mahmoud Tabibpour, N. Moosavi   +3 more
semanticscholar   +1 more source

A QUANTITATIVE STUDY OF THE ANALGESIA PRODUCED BY OPIUM ALKALOIDS, INDIVIDUALLY AND IN COMBINATION WITH EACH OTHER, IN NORMAL MAN

Journal of Pharmacology and Experimental Therapeutics, 1916
1. A convenient method for studying cutaneous pain sensation in man quantitatively and expressing the results in absolute physical units has been described. 2.
D. I. Macht, N. B. Herman, C. Levy
semanticscholar   +1 more source