- 1) Robak, J., Shahidi, F., Wolbis, M., and Krolikowska, M., Screening of the influence of flavonoids on lipoxygenase and cyclooxygenase activity, as well as on nonenzymatic lipid oxidation. Pol. J. Pharmacol. Pharm., 40, 451–458 (1988).
- 2) Ames, B. N., Shigenaga, M. K., and Hagen, T. M., Oxidants, antioxidants, and the degenerative diseases of aging. Proc. Natl. Acad. Sci. U.S.A., 90, 7915–7922 (1993).
- 3) Saito, S., Okamoto, Y., Kawabata, J., and Kasai, T., Quinone hemiacetal from protocatechuic acid during the DPPH radical scavenging reaction. Biosci. Biotechnol. Biochem., 67, 1578–1579 (2003).
- 4) Saito, S., Okamoto, Y., and Kawabata, J., Effects of alcoholic solvents on antiradical activities of protocatechuic acid and its alkyl esters. Biosci. Biotechnol. Biochem., 68, 1221–1227 (2004).
- 5) Kawabata, J., Okamoto, Y., Kodama, A., Makimoto, T., and Kasai, T., Oxidative dimmers produced from protocatechuic and gallic esters in the DPPH radical scavenging reaction. J. Agric. Food Chem., 50, 5468–5471 (2002).
- 6) Tazaki, H., Taguchi, D., Hayashida, T., and Nabeta, K., Stable isotope-labeling studies on the oxidative coupling of caffeic acid via o-quinone. Biosci. Biotechnol. Biochem., 65, 2613–2621 (2001).
- 7) Tazaki, H., Kawabata, J., and Fujita, T., Novel oxidative dimer from caffeic acid. Biosci. Biotechnol. Biochem., 67, 1185–1187 (2003).
- 8) Krishnamachari, V., Levine, H. L., and Pare, W. P., Flavonoid oxidation by the radical generator AIBN: a unified mechanism for quercetin radical scavenging. J. Agric. Food Chem., 50, 4357–4363 (2002).
- 9) Sang, S., Cheng, X., Stark, E. R., Rosen, T. R., Yang, S. C., and Ho, C.-T., Chemical studies on antioxidant mechanism of tea catechins: analysis of radical reaction products of catechin and epicatechin with 2,2-diphenyl-1-picrylhydrazyl. Bioorg. Med. Chem., 10, 2233–2237 (2002).
- 10) Wang, Y., Tan, W., Li, Z. W., and Li, Y., A facile synthetic approach to prenylated flavanones: first total syntheses of (±)-bonannione A and (±)-sophoraflavanone A. J. Nat. Prod., 64, 196–199 (2001).
- 11) Sogawa, S., Nihiro, Y., Ueda, H., Izumi, A., Miki, T., Matsumoto, H., and Satoh, T., 3,4-Dihydroxychalcones as potent 5-lipoxygenase and cyclooxygenase inhibitors. J. Med. Chem., 36, 3904–3909 (1993).
- 12) Beney, C., Mariotto, M.-A., and Boumendjel, A., An efficient synthesis of 4,6 dimethoxyaurones. Heterocycles, 55, 967–972 (2001).
- 13) Mohan, P., and Joshi, T., Two anthochlor pigments from heartwood of Pterocarpus marsupium. Phytochemistry, 28, 2529–2530 (1989).
- 14) Rao, K. Y., Rao, V. C., Kishore, H. P., and Gunasekar, D., Total synthesis of heliannone A and (R,S)-heliannone B, two bioactive flavonoids from Helianthus annuus cultivars. J. Nat. Prod., 64, 368–369 (2001).
- 15) Geissman, T. A., The isolation of eriodictyol and homoeriodictyol. An improved procedure. J. Am. Chem. Soc., 62, 3258–3259 (1940).
Bioscience, Biotechnology, and Biochemistry
Volume 70, 2006 - Issue 1