5,7-dimethyl-3-<2-<4-(2-methoxyphenyl)piperazin-1-yl->ethyl>furo<3,4-d>pyrimidine-2,4-dione 、 alkaline earth salt of/the/ methylsulfuric acid 生成 1-Acetyl-3-{2-[4-(2-methoxy-phenyl)-piperazin-1-yl]-ethyl}-5,7-dimethyl-1H-furo[3,4-d]pyrimidine-2,4-dione