2,3-Dihydrophthalazine-1,4-dione dihydrazone, compound with 3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione (1:1);2,3-dihydrophthalazine-1,4-dione hydrazone; 1,3-dimethyl-9H-purine-2,6-dione
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