2-methyl-9-phenyl-7-(2-thienyl)pyrido[3',2':4,5]-thieno[3,2-d]oxazine-4-one

ethyl 3-amino-4-phenyl-6-(thiophen-2-yl)thieno[2,3-b]pyridine-2-carboxylate

9-phenyl-7-(2-thienyl)pyrido[3',2':4,5]thieno[3,2-d]pyrimidine-4(3H)-thione

7-phenyl-9-(2-thienyl)-[1,2,4]triazolo[4'',3''-c]pyrido[3',2':4,5]thieno[2,3-c]pyrimidine

4-hydrazino-9-phenyl-7-(2-thienyl)pyrido[3',2':4,5]thieno[3,2-d]pyrimidine