One novel coumarin from Angelica dahurica roots was elucidated to be 5
,8-di(2,3-dihydroxy-3-methylbutoxy)-psoralen. It occurs together with
six other known coumarins and ferulic acid. The antimicrobial activity
of the coumarins and ferulic acid were compared. Copyright (C) 1997 E
lsevier Science Ltd.