title: Piptaderol from Piptadenia africana.
abstract: A new glyceryl derivative (Glyceryl-1-hexacosanoate) and a flavone derivative (methyletherapigenin) were isolated from the stem bark extract of Piptadenia africana, a western Cameroonian plant species. Common terpenes like sitosterol, beta-amyrin and eicosane were also isolated. These compounds were identified using physical and spectroscopic methods including mp, IR, (1)H and (13)C-NMR, DEPT, COSY, HMQC, HMBC, EI MS, HREI MS as well as some chemical transformations. The antibacterial activity of the extract, the fractions and the pure compounds is also discussed.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Dschang, Box 67 Dschang, Cameroon. tirouka@yahoo.fr
authors.forename: R N
authors.initials: RN
authors.lastname: Mbouangouere
authors.forename: P
authors.initials: P
authors.lastname: Tane
authors.forename: D
authors.initials: D
authors.lastname: Ngamga
authors.forename: P
authors.initials: P
authors.lastname: Djemgou
authors.forename: M I
authors.initials: MI
authors.lastname: Choudhary
authors.forename: B T
authors.initials: BT
authors.lastname: Ngadjui