title: Retraction notice to 7,8-benzoflavone: a phytotoxin from root exudates of invasive Russian knapweed [Phytochemistry 64 (2003) 493-497].
authors.affiliation: Department of Chemistry, Colorado State University, Fort Collins, CO 80523-1872, USA. frslab@lamar.colostate.edu
authors.forename: Frank R
authors.initials: FR
authors.lastname: Stermitz
authors.forename: Harsh P
authors.initials: HP
authors.lastname: Bais
authors.forename: Tommaso A
authors.initials: TA
authors.lastname: Foderaro
authors.forename: Jorge M
authors.initials: JM
authors.lastname: Vivanco