title: Tricyclic Diterpenes from the Stem Bark of Azadirachta indica.
abstract: Two new diterpenoids, margosone and margosolone, have been isolated from the stem bark of AZADIRACHTA INDICA A. Juss (neem) and their structures established as 12,13-dihydroxy-14-isoporpylpodocarpa-8,11,13-trien-7-one and 13-hydroxy-12-methoxypodocarpa-8,11,13-trien-7-one, respectively, through chemical and spectroscopic studies.
authors.affiliation: H.E.J. Research Institute of Chemistry, University of Karachi, Karachi-32, Pakistan.
authors.forename: I
authors.initials: I
authors.lastname: Ara
authors.forename: B S
authors.initials: BS
authors.lastname: Siddiqui
authors.forename: S
authors.initials: S
authors.lastname: Faizi
authors.forename: S
authors.initials: S
authors.lastname: Siddiqui