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US5693665A Alkylated (hetero) cyclic compounds 失效
烷基化(杂)环化合物

Alkylated (hetero) cyclic compounds
摘要:
The invention relates to a compounds selected from these of formula (I): ##STR1## in which: R.sub.1, R.sub.2, R.sub.3 and A are as defined in the description, and a medicinal product containing the same useful for treating a melatoninergic disorder.
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