(E)-8-(3,4-二甲氧基苯乙烯)-1,3-二乙基-1H-嘌呤-2,6(3h,7h)-二酮;
8-[(E)-2-(3,4-dimethoxyphenyl)ethenyl]-1,3-diethyl-7H-purine-2,6-dione;
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