Abstract
A new abietane diterpene, the 19-O-β-d-glucopyranoside of 16-hydroxylambertic acid was isolated from the leaves of Quillaja brasiliensis together with a known prosapogenin (3-O-β-d-glucuronopyranosyl-quillaic acid), quercetin, and rutin. The new compound was identified by chemical and spectroscopic methods.
Acknowledgements
We are grateful to Marcos Sobral from Universidade Federal do Rio Grande do Sul, Brazil, for collecting and identifying the plant material. This work was supported by fellowships to C. Kauffmann, A.M. Machado, J.D. Fleck, G. Gosmann, V.S. Pires, F.H. Reginatto, and E.P. Schenkel from CNPq (Brazil), and to G. Provensi from FAPERGS (Brazil).