1. 10) Louis, L., Hypocholeretic acid spasmolytic 5,7-dihydroxyflavone derivatives. Ger. Offen., Ger. Patent DE2010505 (Sep. 24, 1970).
2. 16) Smith, M. B., and March, J., Quantitative treatments of the effect of structure on reactivity. In “March’s Advanced Organic Chemistry” 5th ed., Wiley Interscience, New York, pp. 368–375 (2001).
3. 17) Haslam, E., Molecular recognition — phenols and polyphenols. Studies with peptides and proteins. In “Practical Polyphenols”, Cambridge University Press, Cambridge, pp. 168–174 (1998).