Publications scientifiques
Kenneth O. Eyong
Augustin Ephram Nkengfack
Karsten Krohn
Hidayat Hussain
Barbara Schulz
Autres affiliations : Technische Universität Braunschweig
Qunxiu Hu
Autres affiliations : Technische Universität Braunschweig
Chemical and Pharmaceutical Bulletin
Newbouldiaquinone (1), a new naphthoquinone-anthraquinone coupled pigment and a new ceramide named newbouldiamide (2), have been isolated from Newbouldia laevis, besides the known compounds lapachol (3), canthic acid, oleanolic acid, 2-methyl-9,10-anthracenedione, 2-acetylfuro-1,4-naphthoquinone, 2,3-dimethoxy-1,4-benzoquinone, 2-(4-hydroxyphenyl)ethyl triacontanoate, beta-sitosterol and beta-sitosterol glucopyranoside. The structure elucidations of the isolated new compounds were performed on the basis of spectroscopic and chemical evidence. Preliminary studies showed that 1 is moderately antibacterial against Gram-positive Bacillus megaterium and that 3 has moderate herbicidal and antibacterial activities.
