Specification :

2,4-dichlorothieno[3,2-d]pyrimidine
2,4-dichlorothieno[3,2-d]pyrimidine
2,4- dichlorothieno[3,2-d]pyrimidine
2,4-dichlorothieno[3,2-d]pyrimidine
2,4-dich lorothieno[3,2-d]pyrimidine