title: Guaiacin A and B from the Leaves of Guaiacum officinale.
abstract: Guaiacin A and B, two new saponins, have been isolated from the leaves of G. OFFICINALE and were characterised on the basis of (13)C-NMR and FAD mass spectroscopy as 3- O-(beta- D-glucopyranosyl (1-->3)-alpha- L-arabinopyranosyl]-30-nor-olean-12,20(29)-dien-28- O-beta- D-glucopyranosyl ester ( 1) and 3- O-[ D-glucopyranosyl-(1-->3)-alpha- L-arabinopyranosyl] oleanolic acid-28- O-beta- D-glucopyranosyl ester ( 2).
authors.affiliation: H. E. J. Research Institute of Chemistry, University of Karachi, Karachi-32, Pakistan.
authors.forename: V U
authors.initials: VU
authors.lastname: Ahmad
authors.forename: S
authors.initials: S
authors.lastname: Perveen
authors.forename: S
authors.initials: S
authors.lastname: Bano