NEW MATERIAL:The compound of formulaI(n is even number of 2W12; R is H or lower alkyl).

EXAMPLE: Bis-N,N'-(3-benzyloxy-4-methyl-2-nitrobenzoyl)ethylenediamine.

USE: An intermediate of a novel crosslinked phenoxazine which is expected to have antitumor activity.

PROCESS: The compound of formulaIcan be prepared by reacting 3-(benzyloxy)- 2-nitro-4-substituted benzoic acid with phosphorus pentachloride, and reacting the resultant 3-(benzyloxy)-2-nitro-4-substituted-benzoyl chloride with an alkylenediamine or alkylenediamine dihydrochloride of formula H2N-(CH2)n-NH2 or H2N-(CH2)n-NH2.2HCl.