| 摘要 |
A compound represented by the following formula (I), which selectively acts on a mitochondrial benzodiazepine receptor and is useful as a remedy and preventive for anxiety disorders, depression, epilepsy, demential diseases, etc.; and a pharmaceutically acceptable acid addition salt thereof. (I) [In the formula, A represents a group represented by the following formula (I-A): (I-A) (wherein X represents oxygen or sulfur; R4 represents hydrogen, C1-6 alkyl, etc.; and R 5 represents hydrogen, etc.), heteroaryl optionally substituted by halogeno, C1-6 alkyl, or C1-6 alkoxy, etc.; R 1 and R2 are the same or different and each represents hydrogen, C1-6 alkyl, etc.; R3 represents hydrogen, halogeno, C1-6 alkoxy, etc.; Ra and Rb are the same or different and each represents hydrogen or C1-6 alkyl; and n is an integer of 0-5.]
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