Synonyms: 2-(Chlormethyl)-5-phenylthieno[2,3-d]pyrimidin-4(1H)-on;2-(Chloromethyl)-5-phenylthieno[2,3-d]pyrimidin-4(1H)-one;2-(Chloromethyl)-5-phenylthieno[2,3-d]pyrimidin-4(3H)-one;2-Chloromethyl-5-phenyl-3H-thieno[2,3-d]pyrimidin-4-one;thieno[2,3-d]pyrimidin-4(3H)-one, 2-(chloromethyl)-5-phenyl-;thieno[2,3-d]pyrimidin-4-ol, 2-(chloromethyl)-5-phenyl-