1. Arnoldi, A., Bassoli, A., Borgonovo, G. and Merlin, L. Synthesis and Sweet taste of optically active (−)-haematoxylin and of some (±)-haematoxylin derivatives.J. Chem. Soc. Perkin Trans. 1, 2447 (1995).
2. Chatterjea, J. N., Singh, R. P., Lal, P. K. and Shaw, S. C., Homoisoflavanones: Part III Synthesis of 3-hydroxyhomoisoflavanones & a new synthesis of (±)-5,7-di-O-methyleucomol.Indian J. of Chem., 17B, 42 (1979).
3. Chevreul, M.Ann. Chim. 66, 225 (1808).
4. Chevreul, M., Du mémoir sur le bois de camp che et sur la nature de principe colorant.Ann. Chim. 82, 53 (1824).
5. Davis, F. A. and Chen, B.-C. A highly enantioselective synthesis of (R)-and (S)-5,7-O-dimethyleucomol.Tetrahedron Lett., 31, 6823 (1990).