NEW MATERIAL: A compound of a formula B(Q)n (B is a residue formed by removing H from basic N atom of a compound containing amine, amidine, guanidine, iso(thio)urea or biguanide for treating hematherm; Q is H, A {A is formula I [R', R" are each R (R is 1-6C alkyl, aryl, etc.), H, cation, etc.]} m is the number of the first and the second basic N atoms in the compound so that at least one Q is A).

EXAMPLE: 2,2'-Bis [9,10-anthracenediylbis (methylydine-1-hydrazynyl2- iridene)]bis[4,5-dihydro1-(1-oxobutyl)1H-imidazole].

USE: A remedy of leukemia.

PROCESS: A pharmaceutically allowable compound is reacted with a compound of formula II (X is halogen, -N3, -CN, etc.) in the presence of a nonprotonic organic solvent.