Combined therapy of L1210 leukemia with Damvar and cytostatics.

Damvar, the delta-(2-amino-6-hydroxy-3,4-dihydro-4-oxo-5-pyrimidinyl) valeric acid, administered alone s. c. or i. p., has no effect on L1210 leukemia. In DBA2 mice with L1210, Damvar administered in combination with 5-fluorouracil, or with 6-mercaptopurine, or with cyclophosphamide, in optimal doses, enhances or intensifies the antileukemic effects of the above cytostatics.