6-Chloro-5-methoxy-4-pyrimidinamine5018-41-732 % similar Azathioprine446-86-631 % similar 4,6-Dichloro-5-methoxypyrimidine5018-38-231 % similar 3,9-Dihydro-1H-purine-2,6-dithione5437-25-231 % similar N2-Acetylguanine19962-37-930 % similar 6,7-Dimethoxy-3H-quinazolin-4-one13794-72-430 % similar