| 摘要 |
2,2-Dideutero-5-aminolevulinic acid or its salt, or a hydrate or a solvate thereof, preferably 2,2-dideutero-5-aminolevulinic acid hydrochloride, and a process for preparing 2,2-dideutero-5-aminolevulinic acid are provided. The 2,2-Dideutero-5-aminolevulinic acid provided by the present invention is useful as a contrast medium for MRI diagnosis. |
