2,3,8,9,10,11-hexahydro-9-methyl-[1]benzothieno[2',3':4,5]pyrimido[1,2-a]azepine-4,13(1H,7H)-dione 、
1,2,3,4-tetrahydro-12H-[1]benzothieno[3,2-d]pyrido[1,2-a]pyrimidin-12-one 生成 2,3-dihydro-12H-[1]benzothieno[2,3-d]pyrido[1,2-a]pyrimidin-4,12(1H)-one