abstract |
The purpose of the present invention is to improve the solubility of a 3- [2-fluoro-5- (2,3-difluoro-6-methoxybenzyloxy) -4-methoxyphenyl] -2,4-dioxo-1, 2 acid 3,4-tetrahydrothiene [3,4-djpyrimidin-5-carboxylic. A choline salt represented by formula (A) is described, which has excellent solubility and excellent storage stability. |