- DNA damage and sequence specificity of DNA binding of the new anti-cancer agent 1,4-bis(2'-chloroethyl)-1,4-diazabicyclo-[2.2.1] heptane dimaleate (Dabis maleate). Broggini, M., Hartley, J.A., Mattes, W.B., Ponti, M., Kohn, K.W., D'Incalci, M. Br. J. Cancer (1990)