2,4,5-Trichloropyrimidine5750-76-531 % similar 4-Chloro-2-methylquinazoline6484-24-831 % similar 1,3-Dichloroisoquinoline7742-73-631 % similar 2,3-Dichloroquinoxaline2213-63-030 % similar 1,4-Dichlorophthalazine4752-10-730 % similar