abstract |
An objective of the present invention is to improve the solubility of 3 - [2-fluoro-5 -(2,3 -difluoro-6-methoxybenzyloxy)-4-methoxyphenyl]-2,4-dioxo-1,2,3,4-tetrahydrothieno[3,4-d]pyrimidine-5-carboxylic acid. The present invention provides 3 - [2 -fluoro-5 -(2,3 -difluoro-6-methoxybenzyloxy)-4-methoxyphenyl] -2,4-dioxo-1,2,3,4-tetrahydrothieno[3,4-d]pyrimidine-5-carboxylic acid choline salt has excellent solubility and storage stability. |