I Wahlberg, A M Eklund, C Vogt, C R Enzell, J E Berg
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Tobacco chemistry. 65. Two new 7,8-epoxycembranoids from tobacco.
Two new diterpenoids have been isolated from tobacco. They have been identified as the (1S,2E,4S,6R,7R,8R,11E)- and (1S,2E,4S,6R,7S,8S,11E)-7,8-epoxy-2,11-cembradiene-4,6-diols 1 and 2 by synthesis and X-ray analysis. The conformation about the 5,6 bond in some 7,8-epoxycembranoids is discussed, as is the biogenesis of the two new compounds.
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