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Guoyi Ma et al.
The Journal of pharmacology and experimental therapeutics, 322(1), 214-221 (2007-04-05)
Ephedra species of plants have both beneficial and adverse effects primarily associated with the presence of ephedrine alkaloids. Few reports have appeared that examine the direct actions of ephedrine alkaloids on human subtypes of adrenergic receptors (ARs). In the present
Mario Thevis et al.
European journal of mass spectrometry (Chichester, England), 15(4), 507-515 (2009-08-08)
The sympathomimetic agent metamfepramone (2-dimethylamino-1-phenylpropan-1-one, dimethylpropion) is widely used for the treatment of the common cold or hypotonic conditions. Due to its stimulating properties and its rapid metabolism resulting in major degradation products such as methylpseudoephedrine and methcathinone, it has
Lin Zhu et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 820(2), 175-182 (2005-05-19)
A selective and sensitive method has been developed and validated for simultaneous quantification of methylephedrine and noscapine in human plasma. Analytes were extracted from human plasma samples by liquid-liquid extraction, separated on a Diamonsil C18 column and detected by tandem
Kimberly A Kahle et al.
Electrophoresis, 28(11), 1723-1734 (2007-04-28)
The first simultaneous use of a chiral surfactant and a chiral oil for microemulsion EKC (MEEKC) is reported. Six stereochemical combinations of dodecoxycarbonylvaline (DDCV: R, S, or racemic, 2.00% w/v), racemic 2-hexanol (1.65% v/v), and dibutyl tartrate (D, L, or
María José Ojeda-Montes et al.
Future medicinal chemistry, 9(18), 2129-2146 (2017-11-28)
Extracts from Ephedra species have been reported to be effective as antidiabetics. A previous in silico study predicted that ephedrine and five ephedrine derivatives could contribute to the described antidiabetic effect of Ephedra extracts by inhibiting dipeptidyl peptidase IV (DPP-IV).
Kimberly A Kahle et al.
Electrophoresis, 27(4), 896-904 (2006-02-14)
In this study, the combination of two chiral components in a microemulsion formulation for the separation of enantiomers via microemulsion EKC (MEEKC) was successfully accomplished. Previous publications of chiral microemulsions have utilized only one chiral entity; the surfactant, cosurfactant, or
Lihui Zheng et al.
Talanta, 81(4-5), 1288-1294 (2010-05-06)
A simple and effective method of capillary electrophoresis-amperometric detection (CE-AD) coupled with transient isotachophoresis (tITP) was developed for the trace determination of doping substances. Compared with the conventional capillary electrophoresis method, the maximum enhancement factor in terms of peak heights
H J Lee et al.
Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology, 30(6), 563-566 (2010-08-13)
No information is currently available on the safety of methylephedrine, a component of various cold medications available in South Korea. With previous approval by an Institutional Review Board, 349 women inadvertently exposed to methylephedrine during the 1st trimester of pregnancy
David S Bell et al.
Journal of chromatography. A, 1095(1-2), 113-118 (2005-11-09)
Fluorinated, silica-based stationary phases are becoming increasingly popular alternatives to traditional alkyl phases owing to their differential selectivity and retention for a variety of analyte classes. In this report, the ion-exchange mechanisms characteristic of a fluorinated phase are exploited to
Chemistry Letters (Jpn), 981-981 (1980)
Li-Bin Liu et al.
Biomedical chromatography : BMC, 19(6), 447-453 (2005-07-23)
Dimethyl-beta-cyclodextrin (DM-beta-CD) modified capillary electrophoresis has been developed for chiral separation of ephedrine and related compounds, such as (+/-)-norephedrine, (+/-)-N-methylephedrine, (+/-)-ephedrine and (+)-pseudoephedrine. The influence of some crucial parameters such as buffer concentration, pH value, DM-beta-CD concentration, applied voltage and
Satoshi Murao et al.
Internal medicine (Tokyo, Japan), 47(11), 1013-1015 (2008-06-04)
We report a 35-year-old man who was referred to our hospital with generalized convulsion and mixed acidosis presumably caused by abuse of SS-BRON tablets, an over-the-counter (OTC) antitussive medication sold in Japan. These tablets contain dihydrocodeine phosphate, methylephedrine, chlorpheniramine, and
Jingguo Hou et al.
Electrophoresis, 28(9), 1352-1363 (2007-05-01)
In this work, simultaneous separation of eight stereoisomers of ephedrine and related compounds ((+/-)-ephedrine, (+/-)-pseudoephedrine, (+/-)-norephedrine and (+/-)-N-methylephedrine) was accomplished using a polymeric chiral surfactant, i.e. polysodium N-undecenoxycarbonyl-L-leucinate (poly-L-SUCL) by chiral (C)MEKC-ESI-MS. The conditions of CMEKC were first investigated. The
Sabina Strano-Rossi et al.
Therapeutic drug monitoring, 31(4), 520-526 (2009-07-03)
This article describes a method for the detection and quantitation of cathine, pseudoephedrine, ephedrine, and methylephedrine in urine, using their deuterated analogues as internal standards and derivatization to form the corresponding trimethylsilyl derivatives after a simple liquid-liquid extraction. The study
Angewandte Chemie (International Edition in English), 23, 165-165 (1984)
Kimberly A Kahle et al.
Electrophoresis, 27(21), 4321-4333 (2006-11-01)
The effect of cosurfactant identity on microemulsion size, elution range, retention factor, enantioselectivity, methylene selectivity, efficiency, and resolution in chiral microemulsion formulations was examined. The chiral surfactant dodecoxycarbonylvaline was used in conjunction with the cosurfactants 1-butanol, 1-pentanol, 2-pentanol, 1-hexanol, 2-hexanol
Kathlyn A Parker et al.
Organic letters, 10(7), 1349-1352 (2008-03-05)
A short sequence based on asymmetric catalysis, chirality transfer, and an optimized carbometallation protocol gave an anti,anti stereotriad building block in six steps. Both enantiomers of the chirality source, N-methyl ephedrine, are inexpensive, and the auxiliary is recoverable. In one
Li-ping Yu et al.
Zhong yao cai = Zhongyaocai = Journal of Chinese medicinal materials, 34(4), 620-623 (2011-08-04)
To establish the method for determination of ephedrine hydrochloride, pseudoephedrine hydrochloride and methylephedrine hydrochloride in maxingshigan decoction by capillary electrophoresis. The separation was performed on a fused silica capillary of 60 cm x 55 microcrpm ID (52 cm of effective
Takenobu Kunieda et al.
Rinsho shinkeigaku = Clinical neurology, 46(4), 274-277 (2006-06-14)
We report a case of a young patient who had an ischemic stroke due to methylephedrine addiction. A 39-year-old man was admitted to our hospital because of right hemiplegia and persistent numbness. Brain diffusion-weighted magnetic resonance images demonstrated multiple hyperintensity
Yan-Ming Liu et al.
Biomedical chromatography : BMC, 23(11), 1138-1144 (2009-06-06)
A novel method for the determination of ephedra alkaloids (methylephedrine and pseudoephedrine) was developed by electrophoresis capillary (CE) separation and electrochemiluminesence detection (ECL). The use of ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate, BMIMBF(4)) improved the detection sensitivity markedly. The conditions for CE
Yan-Ming Liu et al.
Electrophoresis, 30(8), 1406-1411 (2009-03-19)
A new approach for the determination of methylephedrine hydrochloride (ME), thebaine, codeine phosphate (CP), and acetylcodeine (AC) was established by CE-ECL with ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate). The conditions for the CE separation, ECL detection, and the effect of ionic liquid
Caterina Fraschetti et al.
Chemical communications (Cambridge, England), (22)(22), 2544-2546 (2008-05-29)
Collision induced dissociation (CID) of the m/z 479 ion, formed by ESI of Co(NO3)2-CH3OH solutions with either pure (1S,2S)-(+)-N-methylpseudoephedrine or its mixtures with (1S,2R)-(+)- or (1R,2S)-(-)-ephedrine, provides compelling evidence for fast, stereoselective reactions in Co(II)/neurotrasmitter(s) aggregates during solvent evaporation of
Syeda A B Shah et al.
Journal of pharmaceutical and biomedical analysis, 61, 64-69 (2012-01-03)
Recent abuse of designer drugs such as mephedrone has presented a requirement for sensitive, reliable and reproducible methods for the detection of these controlled drugs in different matrices. This study focuses on a fully developed validated method for the quantitative
Wei Zhao et al.
Journal of Asian natural products research, 11(2), 168-171 (2009-02-17)
A new naphthalene derivative, 1-methyl-2,3-methylenedioxy-6-naphthalenecarboxylic acid methyl ester (1), and a new alkaloid, ( +/- )-1-phenyl-2-imido-1-propanol (2), together with the four known compounds, ephedrine, pseudoephedrine, N-methylephedrine, and 6-methoxykynurenic acid, have been isolated from the stems of Ephedra sinica, a famous
Kuei Hui Chan et al.
Biomedical chromatography : BMC, 19(5), 337-342 (2005-06-03)
A rapid and reliable high-performance liquid chromatographic method was developed and validated for the simultaneous determination of norephedrine (NE), norpseudoephedrine (NPE), ephedrine (E), pseudoephedrine (PE), methylephedrine (ME) and methylpseudoephedrine (MPE) in both a Mahwang traditional Chinese medicine (TCM) preparation and
P Van Eenoo et al.
Journal of analytical toxicology, 31(9), 543-548 (2007-12-21)
For a correct interpretation of analytical results in doping control, knowledge on the stability of prohibited substances in the urinary matrix is a prerequisite. So far, limited data is available on the stability of prohibited substances in unaltered urine because
Hao Hong et al.
Journal of natural medicines, 65(3-4), 623-628 (2011-04-06)
In the present paper, a fast and economical HPLC method [on a Phenomenex Polar-RP column with a solution of (phosphoric acid:triethylamine:dibutylamine:water = 0.40:0.1:0.2:499.3) and methanol] is developed, and applied for the determination of norephedrine, norpseudoephedrine, ephedrine (E), pseudoephedrine (PE) and methylephedrine (ME)
Noboru Imai et al.
Internal medicine (Tokyo, Japan), 49(4), 335-338 (2010-02-16)
Methylephedrine is generally harmless and is contained in many cough and cold preparations. Likewise, Chinese herbal drugs are considered to be effective and to have few side effects. A 32-year-old woman experienced ischemic stroke attributed to concomitant administration of a
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