5,7-Dichlorothiazolo(5,4-d)pyrimidine13479-88-431 % similar 2,4-Dichlorothieno[3,2-D]pyrimidine16234-14-331 % similar 2,4-Dichlorothieno[2,3-d]pyrimidine18740-39-131 % similar 2,4,6-Trichloro-5-nitropyrimidine4359-87-931 % similar 2,4,5-Trichloropyrimidine5750-76-531 % similar 2,4-Dichloropyrido[3,2-D]pyrimidine39551-54-731 % similar 4,6-Dichloro-1H-pyrazolo(3,4-d)pyrimidine42754-96-131 % similar 2,4-Dichloro-5H-pyrrolo[3,2-D]pyrimidine63200-54-431 % similar 2,4,7-Trichloropyrido(2,3-d)pyrimidine938443-20-031 % similar 2,4-Dichlorofuro[3,2-D]pyrimidine956034-07-431 % similar