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. 2008 Nov;59(15):4171–4182. doi: 10.1093/jxb/ern260

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© 2008 The Author(s).

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

This paper is available online free of all access charges (see http://jxb.oxfordjournals.org/open_access.html for further details)

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Fig. 6. — Mass spectra of ancient cannabis. Subsections demonstrate the phytocannabinoids cannabinol (CBN), cannabidiol (CBD), cannabicyclol (CBL), cannabinolivarin (CBNV), cannabichromene (CBC), cannabielsoin (CBE), 1′-oxcannabinol, and 1′-hydroxycannabinol.