2,4,5,6-Tetrachloropyrimidine1780-40-132 % similar 2,4,6,8-Tetrachloropyrimido[5,4-d]pyrimidine32980-71-532 % similar 2,5-Dichloro-4,6-dimethylpyridine-3-carbonitrile91591-63-831 % similar 3,6-Dichloro-4-methoxypyridazine70952-62-431 % similar 2,3-Dichloropyrazine4858-85-930 % similar 3,4-Dichloro-1,2,5-thiadiazole5728-20-130 % similar