2-methyl-5,7-dihydrothieno[3,4-d]pyrimidin-4-ol, Thieno(3,4-d)pyrimidin-4(3H)-one,5,7-dihydro-2-methyl, Thieno(3,4-d)pyrimidin-4(1H)-one,5,7-dihydro-2-methyl, 5,7-Dihydro-2-methylthieno(3,4-d)pyrimidin-4-ol,
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