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J Pharm Pharmacol. 1976 Apr;28(4):280-5.

Characterization of the butyl homologues of delta1-tetrahydrocannabinol, cannabinol and cannabidiol in samples of cannabis by combined gas chromatography and mass spectrometry.


The butyl homologues of delta1-tetrahydrocannabinol, delta1-tetrahydrocannabinolic acid, cannabinol and cannabidiol have been identified in several samples of cannabis. 8 samples contained delta1-tetrahydrocannabinolic acid, one sample contained cannabinol and one sample contained both cannabinol and cannabidiol. Separation by gas chromatography and identification by gas chromotography-mass spectrometry was achieved by the preparation of trimethylsilyl, d9-trimethylsilyl, triethylsilyl and tri-n-propylsilyl derivatives.

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