Teucrium flavum

Teuflin, from Teucrium flavum (Labiatae) has been assigned the stereochemistry (39) epimeric at C-10 to teucvidin on the basis of an X-ray analysis. Isocrotocaudin (40) from Croton caudatus (Euphorbiaceae) is an 11(12)-dehydro-derivative which is similar to crotocaudin and teucvidin. The c.d. curves of the a/3-unsaturated lactones have been used to assign the absolute stereochemistry in this series. Plaunol A (41) and plaunol B (42) are anti-ulcer diterpenoid lactones which have been isolated from the Thai medicinal drug Croton sublyratus (Euphorbiaceae). Baccharis genistelloides (Compositae) has afforded a clerodane dilactone (43) similar to that isolated previously from B. trimera. 

From the aerial parts of Teucrium species flavonoids have been also isolated, although they are not abundant. Luteolin was obtained from T. scorodonia [26], salvigenin from T. flavum [65], salvigenin, circimaritin from T. massiliense [55], luteolin, luteolin 7-0-glucoside and 6-... 

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