| 摘要 |
<p>Disclosed are crystals of the compound represented by Formula (1), which has A²-production-reducing effects and is a prodrug of compounds effective in treating neural degenerative diseases of which A² is the cause, for example, diseases such as Alzheimer's disease, Down syndrome, etc., and salts thereof or crystals of salts thereof. These are particularly useful as stock for pharmaceutical products.</p> |
