Abstract

A monocyclic triterpene ester, iristectorene B, has been isolated from the seeds of Iris tectorum. On the basis of spectroscopic methods and chemical evidence, the ester was shown to be 3-{3-hydroxy-2-[5-hydroxy-4,8,12- trimethyl-( 3E,7E)-3,7,11-tridecatrienyl]-2,3-dimethyl-6-(1-methyl-2-oxoethylidene)cyclohexyl} propyl tetradecanoate and its stereochemistry was also clarified.

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