3-(dibromomethyl)-6,8-dimethylpyrimido[5,4-e][1,2,4]triazine-5,7(6H,8H)-dione

3-Bromomethyl-6,8-dimethyl-8H-pyrimido[5,4-e][1,2,4]triazine-5,7-dione

(6,8-dimethyl-5,7-dioxo-5,6,7,8-tetrahydropyrimido[5,4-e][1,2,4]triazin-3-yl)methyl acetate

9-Aminotheophylline

6,8-dimethyl-4-oxidopyrimido[5,4-e][1,2,4]triazin-4-ium-5,7-dione