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The aerial parts of Cannabis sativa var. Carma afforded a novel polar cannabinoid whose structure was established as rac-6′,7′-dihydro,6′,7′-dihydroxycannabigerol (carmagerol, 1) on the basis of spectroscopic data and semisynthesis from cannabigerol (2a). The dihydroxylation of the ω-double bond was detrimental to the anti-bacterial activity.
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Appendino et al. (2008) studied this question.
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