4-Chloro-1-benzothiophene66490-33-331 % similar 2,4,6-Trichloro-5-methylpyrimidine1780-36-530 % similar Thieno(2,3-d)pyrimidin-4(3H)-one14080-50-330 % similar 4-Chloro-2-phenylquinazoline6484-25-930 % similar