Abstract
Three species of the genus Teucrium have been investigated. Two of them ( T. rivas-martinezii and T. divaricatum subsp. divaricatum) contain known neo-clerodane diterpenoids, and the other one ( T. asiaticum) contains a new neo-clerodane derivative, teucrasiatin, together with another previously known diterpene. The structure of teucrasiatin [(12 S, 20 S)-19-acetoxy-4α,18;15,16-diepoxy-6-oxo- neo-cleroda-13(16),14-diene-20,12-hemiacetal] was established by chemical and spectroscopic means.
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