title: Allelochemicals fromPilocarpus goudotianus leaves.
abstract: The effect on germination, shoot, and root growth by bergapten, xanthotoxin, imperatorin, xanthyletin, xanthoxyletin, luvangetin, donatin and alloxanthoxyletol fromPilocarpus goudotianus leaves, onLactuca sativa var. nigra seedlings has been evaluated. A structure-activity correlation is discussed based on the bioassay results. Furanocoumarins appear to be the most active compounds in comparison with pyrano- and simple coumarins. The presence of an oxygenated function at C-8 decreases the germination effect in furano- and pyranocoumarins, while C-5 substituents do not cause significant changes on the activity.
authors.affiliation: Departamento de Quimica OrgánicaFacultad de Ciencias, Universidad de Cádiz, Apdo. 40, 11510, Puerto Real, Cádiz, Spain.
authors.forename: F A
authors.initials: FA
authors.lastname: Macías
authors.forename: J C
authors.initials: JC
authors.lastname: Galindo
authors.forename: G M
authors.initials: GM
authors.lastname: Massanet
authors.forename: F
authors.initials: F
authors.lastname: Rodriguez-Luis
authors.forename: E
authors.initials: E
authors.lastname: Zubia