| abstract |
group, orn in which each of n and m is 0, 1 or 2, n + m is 0, 1 or 2,n and B is n or n [in which R represents a hydroxyl group, a lower alkoxy (wherein each of R, and R 2 is a hydrogen atom, a lower alkyl group or an aryl group)]; provided that R is a lower alkoxy orn n especially as anti-cancer agent. |