| abstract |
A solution in which a compound represented by the following formula (I) or a pharmacologically acceptable salt thereof and a compound represented by any one of the following general formulas (II) to (IV) are dissolved in an organic solvent: A first step of preparing, a second step of removing the organic solvent from the solution, and a third step of dissolving the residue by adding a solution to the residue obtained by the second step. Thus, an aqueous solution preparation containing compound (I) can be produced. [Chemical 1] |