A 3-Oxadiazolyl-5,6,7,8-tetrahydro-1,6-naphthyridine derivative of the formula (I): CHEM wherein Het is an oxadiazole ring, R1 is hydrogen atom, an acyl group, a lower alkyl group or a group of the formula: -CH2R1' (in which R1' is a cyclo-lower alkyl group, a lower alkenyl group, a lower alkynyl group, benzyl group, aryl group or a heteroaromatic group), R2 is a lower alkyl group, a cyclo-lower alkyl group, a lower alkenyl group, a lower alkynyl group, aryl group, a heteroaromatic group, a halogeno-lower alkyl group, a lower alkoxy-lower alkyl group, a lower alkoxy group, a lower alkenyloxy group, a phenoxy group or a lower alkylthio group, or a pharmaceutically acceptable acid addition salt thereof, is useful as benzodiazepine receptor agonist.
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机译：式（I）的3-恶二唑基-5,6,7,8-四氢-1,6-萘啶衍生物：其中Het为恶二唑环，R1为氢原子，酰基，低级烷基-CH 2 R 1'（其中R 1'为环-低级烷基，低级烯基，低级炔基，苄基，芳基或杂芳族基团），或R 2为低级烷基基，环-低级烷基，低级烯基，低级炔基，芳基，杂芳族基团，卤代低级烷基，低级烷氧基-低级烷基，低级烷氧基，低级烯氧基苯氧基或低级烷硫基或其药学上可接受的酸加成盐可用作苯并二氮杂receptor受体激动剂。
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