4,5]-thieno[3,2-d]pyrimidines**
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10-(p-methoxyphenyl)-4-oxo-3-phenyl-1,2,3,4-tetrahydro-2-thioxocyclopenta-[5',6']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine
10-(p-methoxyphenyl)-4-oxo-3-phenyl-1,2,3,4-tetrahydro-2-thioxocyclopenta-[5',6']pyrido[3',2':4,5]thieno[3,2-d]pyrimidine
