| 摘要 |
New piperazine derivatives and homologs thereof of formula <IMAGE> wherein n is equal to 2 or 3 and m to 1, 2 or 3; X REPRESENTS HYDROGEN OR A METHYL GROUP R represents hydrogen or a C1 to C6 lower alkyl group or a C1 to C3 hydroxyalkyl group; and R1 is one of the following groups:
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