The present invention provides a
piperazine derivative, as shown in formula (I) or its stereoisomers and pharmaceutically acceptable salts thereof; the
piperazine derivative provided by the present invention has a strong affinity for
dopamine D2, D3, and 5-HT1A, 5-HT2A receptors of 5-hydroxytryptamine, and has a medium affinity for
dopamine D4 and 5-HT2C, 5-HT7 of 5-hydroxytryptamine and α1-adrenaline,
histamine H1 receptors, and also has a medium affinity for 5-hydroxytryptamine
reuptake sites, and has no obvious affinity for
cholinergic muscarinic receptors. Functionally, it is a
partial agonist of D2 and 5-HT1A receptors and an
antagonist of 5-HT2A receptors, and can be used to treat or prevent diseases that require regulation of one or more of
dopamine D2 receptors, 5-HT1 receptors, 5-HT2 receptors, 5-HT7 receptors, α1-adrenaline receptors,
histamine H1 receptors and 5-hydroxytryptamine
reuptake sites.