Four new isoflavonoids and a new 2-arylbenzofuran from the roots of erythrina variegata

摘要

Four new isoflavonoids,eryvarins H-K,and a new 2-arylbenzofuran,eryvarin L,together with five known compounds,wer eisolated from the roots of Erythrina variegata.Their structures wer eestablished on the basis of spectroscopic analysis.eryvarins H and I and rare naturally-occurring isoflav-3-enes.the antibacterial activity of these five new compouns against 13 strains of methicillinresistant Staphylococcus aureus (MRSA) was examined.