title: Pyrrolizidine alkaloids from amphorogyne spicata
abstract: Four pyrrolizidine alkaloids, amphorogynines A-D (1-4), which belong to a new type having substituents at C-1 and C-6, were isolated from Amphorogyne spicata (Santalaceae). Their structures were elucidated by spectroscopic methods. The absolute stereochemistry (7aR) of the two main alkaloids, amphorogynines A and D, was determined using chemical correlations.
authors.affiliation: Institut de Chimie des Substances Naturelles, CNRS, 911978 Gif-sur-Yvette Cedex, France.
authors.lastname: Thu Huong DT
authors.initials: MT
authors.lastname: Martin
authors.initials: M
authors.lastname: Litaudon
authors.initials: T
authors.lastname: Sevenet
authors.initials: M
authors.lastname: Pais