175600-09-6 3-Amino-2-((4-chlorophenyl)amino)-5,6-dimethylthieno(2,3-d)pyrimidin-4(3H)-one Thieno(2,3-d)pyrimidin-4(3H)-one, 3-amino-2-((4-chlorophenyl)amino)-5,6-dimethyl-