Abstract
Three new iridals were isolated, along with two known compounds; (+)-6 R,10 S,11 S,14 S,26 R)-26-hydroxy-15-methylidenespiroirid-16-enal and iso-iridogermanal, from the rhizomes and roots of Belamcanda chinensis and Iris japonica. The new iridals were determined to be 28-acetoxy-14,15-dihydro-26-hydroxy-19-methylidenespiroirida-15,17-dienal (belamcandal), its deacetyl derivative and 16- O-acetyl iso-iridogermanal. Their fatty acid esters were also isolated. Belamcandal stimulates throat membrane.
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