Azaanthracene-triones of the formula: ##STR1## (in which: R.sup.1, R.sup.2, R.sup.4 and R.sup.5 are the same or are different and each is a hydrogen atom or a lower alkyl group; R.sup.3 is a hydrogen atom, a lower alkyl group, a phenyl group or an amino-substituted phenyl group; and X is a --CH--, .dbd.N-- or --NH--, whereby the ring containing the group X is a benzene, pyridine or dihydropyridene ring) have antitumoral activity.
Azaanthracene-triones of the formula:
(in which: R¹, R², R⁴ and R⁵ are the same or are different and each is a hydrogen atom or a lower alkyl group;
R³ is a hydrogen atom, a lower alkyl group, a phenyl group or an amino-substituted phenyl gro up; and
X is a -CH-, =N- or -NH-, whereby the ring containing the group X is a benzene, pyridine or dihydropyridene ring)
have antitumoral activity.