REFERENCES
- Bohm B, Bhat UG, Miller JM (1984): Further studies of fiavonoids in Saxifraga. Biochem Syst Ecol 12: 367–368.
- Bors W, Heller W, Michel Ch, Saran M (1990): Flavonoids as antioxidants: determination of radical-scavenging effi-ciencies. Meth Enzymol 86: 343–355.
- Bors W, Saran M, Eltsner EF (1992): Modern Methods of Plant Analysis, New Series. Berlin, Springer-Verlag, 13: 277–295.
- Cavin A, Hostettmann K, Potterat O (1998): Antioxidant and lipophilic constituents of Tinospora crispa. Planta Med 64: 393–396.
- Chevalley I, Marston A, Hostettmann K (1999): A new gal-lic acid fructose ester from Saxifraga stellaris. Phyto-chemistry 50: 151–154.
- Clark-Lewis JW, Jackman LM, Spotswood TM (1964): Nuclear magnetic resonance spectra, stereochemistry, and conformation of fiavan derivatives. Aust J Chem 17: 632–648.
- Cuendet M, Hostettmann K, Potterat O (1997): Iridoid glu-cosides with free radical scavenging properties from Fagraea blumei. Hely Chim Acta 80: 1 PM 1151.
- Czochanska Z, Foo L, Newman R, Porter L (1980): Poly-meric proanthocyanidins. Stereochemistry, structural units and molecular weight. J CS Perkin I: 2278–2286.
- Drewes S, Fletcher 1(1974): Polyhydroxystilbenes from the heartwood of Schotia brachypetala. J C S Perkin I: 961–962.
- Hess L, Hirzel R (1977): Flora der Schweiz. Basel und Stuttgart, Birkhäuser Verlag, 2: 287.
- Jang M, Cai L, Udeani G, Slowing K et al. (1997): Cancer chemopreventive activity of resveratrol, a natural product derived from grapes. Science 275: 218–220.
- Jay M, Lebreton Ph (1965): Action de la lumière sur la biosynthèse leucoanthocyanique chez Saxifraga cuneifo-ha. Physiol Vég 8: 489–497.
- Kouno I, Inoue M, Kawano N (1988): Iridoid and phenolic glucoside from Vitex rotundifolia. Phytochemistry 27: 611–612.
- Lamaison J.-L, Petitjean-Freyet C, Carnat A (1991): Medic-inal Lamiaceae with antioxidant properties, a potential source of rosmarinic acid. Pharm Acta Hely 66: 185–188.
- Markham K R, Geiger H (1994): JB Harborne, ed., The Flavonoids: Advances in Research Since 1986. London, Chapman and Hall, 459.
- Miller J, Bohm B (1980): Flavonoid variation in some North American Saxifraga species. Biochem Syst Ecol 8: 279–284.
- Nakane H (1990): Differential inhibitory effects of some catechin derivatives on the activities of human immuno-deficiency virus reverse transcriptase and cellular deoxy-ribonucleic and ribonucleic acid polymerases. Biochemistry 29: 2841–2845.
- Nonaka G, Kawahara O, Nishioka I (1983): Tannins and related compounds. XV. A new class of dimeric fiavan-3- ol gallates, theasinensis A and B, and proanthocyanidin gallates from green tea leaf. Chem Pharm Bull 31: 3906–3914.
- Orsini F, Pelizzoni F, Aburjai T (1997): Isolation, synthesis and antiplatelet aggregation activity of resveratrol D-glucopyranoside and related compounds. J Nat Prod 60: 1082–1087.
- Pawlowska L (1976): The chemotaxonomic investigations on the fiavonoid compounds in the leaves of Saxifraga aizoon Jacq. Acta Soc Bot Pol 45: 383–393.
- Saijo R, Nonaka G, Nishioka 1(1990): Gallic acid esters of bergenin and norbergenin from Ma/lotus japonicus. Phytochemistry 29: 267–270.
- Shen C, Cheng Y, Ho L (1993): Nuclear magnetic resonnance studies of 5,7-dihydroxyflavonoids. Phytochemistry 34: 843–845.
- Shimamura T, Hara Y (1997): Method of potentiating anti-biotics with polyphenols, 18. European Patent Applica-tion, EP761226 Al.
- Smite E, Lundgren L, Andersson R (1993): Arylbutanoid and diarylheptanoid glycosides from inner bark of Betula pen-dula. Phytochemistry 32: 365–369.
- Tanayama M, Yoshida S, Kobayashi M, Hasegawa M (1983): Isolation of norbergenin from Saxifraga stonolifera. Phytochemistry 22: 1053–1054.
- Wildi B, Lutz C (1996): Antioxidant composition of selected high plant species from different altitudes. Plant Cell Env 19: 138–146.
- Yoshitama K, Oyamada T, Yahara S (1997): Flavonoids in the leaves of Trillium undulatum Willdenow. J Plant Res 110: 379–381.