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The structure of a clerodane-6,7-dione (Z), isolated from Teucrium polium L., has been established, and related to that of the corresponding 7-hydroxy-6-ketone picropolin (3). The stereostructures of (2) and (3) are tentatively assigned.THE diterpene content of T. polium has been investigated previously; picropolin (3), a diterpene of the clerodane type, was reported as the main component. A reinvestigation of this plant, collected at Arganda (Madrid), was undertaken with the primary aim of isolating this compound. Since the actual content of our plant material differs considerably from that reported, we now describe our results, Three diterpenes were isolated. The lH n.m.r. " CH,OAC ia ( 1 ) R' =H,H, R ~= O (2) R ' = O J R2=O

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