A novel natural compound having various therapeutically effects is provided. The compound is obtainable from Sibiraea leaves by aqueous extraction and is represented by a formula (1) as follows. ##STR00001##

 
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< Inhibition of antigen presentation with poorly catabolized polymers

> Method and device for producing dispersions

> Biologically absorbable coatings for implantable devices based on poly(ester amides) and methods for fabricating the same
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