2-Methyl-5,7-dihydrothieno[3,4-d]pyrimidine (CAS NO.36267-71-7), its Synonyms are 5,7-Dihydro-2-methylthieno(3,4-d)pyrimidine ; Thieno(3,4-d)pyrimidine, 5,7-dihydro-2-methyl- .