A novel neo-clerodane diterpene, teuponin, together with two flavones, acacetin and cirsimaritin, were isolated from the aerial parts of Teucrium japonicum. The structure for teuponin was established as (12S)-19-nor-neo-cleroda-15-alpha-hydroxy-4,13-diene-16,15; 18,6-beta; 20, 12-triolide by spectroscopic means. Its absolute configuration was determined by X-ray diffraction analysis and from its CD spectrum.
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KING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIAKING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIA
SATTAR, EA
MOSSA, JS
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KING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIAKING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIA
MOSSA, JS
MUHAMMAD, I
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KING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIAKING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIA
MUHAMMAD, I
ELFERALY, FS
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KING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIAKING SAUD UNIV,COLL PHARM,MED AROMAT & POISONOUS PLANTS RES CTR,RIYADH 11451,SAUDI ARABIA