The Structure of Desmocarpin, a Pterocarpan Phytoalexin from Desmodium gangeticum
نویسندگان
چکیده
Ethyl acetate extracts o f diffusates from the fungus-inoculated leaflets o f Desmodium gangeti cum have been found to contain six isoflavonoid phytoalexins including the isoflavones genistein and 2'-hydroxygenistein, and the isoflavanones dalbergioidin, diphysolone and kievitone. These known phytoalexins occur together with a new antifungal isoflavonoid (desmocarpin) for which the structure (—)-(6a/?; 1 la/?)-l,9-dihydroxy-3-m ethoxypterocarpan is proposed.
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