title: Pyrrolizidine alkaloids from Eupatorium portoricense.
abstract: Three pyrrolizidine alkaloids were isolated from Eupatorium portoricense and their structures elucidated by spectroscopic methods as (-)-viridifloryl-supinidine (amabiline), (-)-viridifloryl-heliotridine (echinatine), and C12- O-acetyl-(-)-viridifloryl-heliotridine (O(12)-acetylechinatine).
authors.forename: H
authors.initials: H
authors.lastname: Wiedenfeld
authors.forename: R
authors.initials: R
authors.lastname: Guerrero
authors.forename: E
authors.initials: E
authors.lastname: Roeder