Wiktionary
calycosin
n. (context organic compound English) An isoflavone found in ''Astragalus propinquus''.
Wikipedia
Calycosin
Calycosin is an O-methylated isoflavone. It can be isolated from Astragalus membranaceus Bge. var. mongholicus and Trifolium pratense L. (red clover).