pyrimidine,cytosine

4-(4-(difluoromethoxy)phenyl)pyrimidine-2-thiol
106691-22-9 (6-methylthieno[2,3-d]pyrimidine)
4-chloro-2-cyclopropyl-6-(4-fluorophenyl)pyrimidine
5-methyl-2,3-dihydroimidazo[1,2-a]pyrimidine-6,7-diamine
3-amino-5,7-dimethylisoxazolo[3,4-d]pyrimidine-4,6(5h,7h)-dione