Synthesis and Cytotoxicity of 5-Deazaflavins Containing o-and p-Quinone Moieties.-The substituent R1 has great influence on the activity of the title compounds, e.g. (III), whereas the chain length of the R2 substituent seems to be not interesting for activity. -(KIMACHI, T.; SUGITA, K.; TAMURA, Y.; KAGAWA, M.; YAMASAKI, K.; YONEDA, F.; SASAKI, T.; Bioorg. Med. Chem. Lett. 7 (1997) 6, 753-756; Fac. Pharm. Sci., Kyoto Univ., Sakyo, Kyoto 606, Japan; EN)