A new flavone dimer, drypetdimer A (1), was isolated from Drypetes gerrardii J. Hutch. The structure of the new compound was elucidated by detailed spectroscopic analysis such as 1H, 13C NMR, COSY, HMQC, HMBC and HREIMS.
FarombiE.O. (2003) African indigenous plants with chemotherapeutic potentials and biotechnological approach to the production of bioactive prophylactic agents. African Journal Biotechnology, 2, 662–661.
2.
(a) TazooD., KrohnK., HussainH., KouamS.F., DongoE. (2007) Laportoside A and laportomide A: A new cerebroside and a new ceramide from leaves of Laportea ovalifolia. Zeitschrift für Naturforschung, 62B, 1208–1212; (b) Antoine KZ, Hussain H, Dongo E, Kouam SF, Schulz B, Krohn K. (2010) Cameroonemide A: a new ceramide from Helichrysum cameroonense. Journal of Asian Natural Products Research, 12, 629-633; (c) Eyong KO, Krohn K, Hussain H, Folefoc GN, Nkengfack AE, Schulz B, Hu Q. (2005) Newbouldiaquinone and newbouldiamide: a new naphthoquinone-anthraquinone coupled pigment and a new ceramide from Newbouldia laevis. Chemical and Pharmaceutical Bulletin, 53, 616-619; (d) Bouberte MY, Krohn K, Hussain H, Dongo E, Schulz B, Hu Q. (2006) Tithoniamarin and tithoniamide: a new isocoumarin dimer and a new ceramide from Tithnonia diversifolia. Natural Product Letters, 20, 842-849; (e) Bouberte MY, Krohn K, Hussain H, Dongo E, Schulz B, Hu Q. (2006) Tithoniaquinone A and tithoniamide B: a new anthraquinone and a new ceramide from the leaves of Tithnonia diversifolia. Zeitschrift für Naturforschung B, 61B, 78-82.
3.
(a) MoreiraI.C., CarvalhoM.G., BastosABFO, Braz-FilhoR. (1999) A flavone dimer from Ouratea hexasperma. Phytochemistry, 51, 833–838;(b) Kuo YH, Hwang SY, Kuo LMY, Lee Z, Li SY, Shen ZC. (2002) A novel cytotoxic C-methylated biflavone, taiwanhomoflavone-B from the twigs of Cephalotaxus wilsoniana. Chemical Pharmaceutical Bulletin, 50, 1607-1608.
4.
SilvaG.L., ChaiH., GuptaM.P., FarnsworthN.R., CordellG.A., PezzutoJ.M., BeecherC.W.W., KinghornA.D. (1995) Cyctotoxic biflavonoids from Selaginella willdenowii. Phytochemistry, 40, 129–134;(b) Murthy SSN. (1983) A biflavonoid from Semecarpus anacardium. Phytochemistry, 22, 1518-1520; (c) Daniel JFS, Carvalho, MG, Cardoso, RS, Agra, MF, Eberlin, MN. (2005) Other flavonoids from Ouratea hexasperma (Ochnaceae). Journal of Brazilian Chemical Society, 16, 634-638.
