methyl 2-[4-[[2-(3-fluoro-4-methoxy-phenyl)-6,6-dioxo-5,7-dihydro-thieno[3,4-d]pyrimidin-4-yl]oxy]-phenyl]-acetate 、
2-[4-[[2-(5-fluoro-thiophen-2-yl)-6,6-dioxo-5,7-dihydro-thieno[3,4-d]pyrimidin-4-yl]oxy]phenyl]-acetic acid 生成 2-[4-[[2-(3-fluoro-4-methoxy-phenyl)-6,6-dioxo-5,7-dihydro-thieno[3,4-d]pyrimidin-4-yl]oxy]-phenyl]-acetic acid