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Ecstasy analogues found in cacti.
Bruhn JG, El-Seedi HR, Stephanson N, Beck O, Shulgin AT. Bruhn JG, et al. Among authors: beck o. J Psychoactive Drugs. 2008 Jun;40(2):219-22. doi: 10.1080/02791072.2008.10400635. J Psychoactive Drugs. 2008. PMID: 18720674
Mescaline use for 5700 years.
Bruhn JG, De Smet PA, El-Seedi HR, Beck O. Bruhn JG, et al. Among authors: beck o. Lancet. 2002 May 25;359(9320):1866. doi: 10.1016/S0140-6736(02)08701-9. Lancet. 2002. PMID: 12044415 No abstract available.
Accurate identification and quantification of 11-nor-delta(9)-tetrahydrocannabinol-9-carboxylic acid in urine drug testing: evaluation of a direct high efficiency liquid chromatographic-mass spectrometric method.
Stephanson N, Josefsson M, Kronstrand R, Beck O. Stephanson N, et al. Among authors: beck o. J Chromatogr B Analyt Technol Biomed Life Sci. 2008 Aug 1;871(1):101-8. doi: 10.1016/j.jchromb.2008.06.047. Epub 2008 Jul 3. J Chromatogr B Analyt Technol Biomed Life Sci. 2008. PMID: 18620911
Direct injection LC-MS/MS method for identification and quantification of amphetamine, methamphetamine, 3,4-methylenedioxyamphetamine and 3,4-methylenedioxymethamphetamine in urine drug testing.
Andersson M, Gustavsson E, Stephanson N, Beck O. Andersson M, et al. Among authors: beck o. J Chromatogr B Analyt Technol Biomed Life Sci. 2008 Jan 1;861(1):22-8. doi: 10.1016/j.jchromb.2007.11.025. Epub 2007 Nov 28. J Chromatogr B Analyt Technol Biomed Life Sci. 2008. PMID: 18088576
535 results