4-Chloro-2-(chloromethyl)-5,6-dimethylthieno[2,3-d]pyrimidine;4-Chloro-2-chloromethyl-5,6-dimethyl-thieno[2,3-d]pyrimidine;thieno[2,3-d]pyrimidine, 4-chloro-2-(chloromethyl)-5,6-dimethyl-
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