4,6-Dichloro-5-nitro-pyridine 4,6-Dichloro-5-nitropyrimidine 4-23-00-00899 (Beilstein Handbook Reference) 4316-93-2 BRN 0162029 EINECS 224-340-6 NSC 89693 PYRIMIDINE, 4,6-DICHLORO-5-NITRO-