PTERIDINES AND GRUG COMPOSITION CONTAINING SAME

The invention relates to medicaments containing a pteridine of the formula in which n is the number 0 or 1, R2 and R7 are each a pyrrolidino, piperidino or morpholino group which is optionally substituted by one or two methyl groups, R3 is a straight-chain or branched alkyl group in which one or two carbon atoms, excepting the carbon atom adjacent to the nitrogen atom, can be substituted by a hydroxyl group, R is an alkyl or phenylalkyl group, in which one carbon atom, excepting the carbon atom adjacent to the nitrogen atom, can be substituted by a hydroxyl group, and R5 is a hydrogen atom or a methyl group, or the acid addition salts thereof and at least one chemotherapeutic from the natural product series, and to the use of the above pteridines for sensitisation of tumours during chemotherapy with the abovementioned chemotherapeutics, and to pteridines, process for the preparation thereof and medicaments containing these pteridines.