Mixtecacin, a prenylated flavanone and oaxacacin its chalcone from the roots of Tephrosia woodii

From the roots of Tephrosia woodii , a new Mexican Tephrosia species, a new prenylated flavanone, oaxacacin, and its chalcone, mixtecacin, have been isolated and their structures elucidated from their chemical properties and spectral data.