Novel amisulpride derivatives and pharmaceutical compositions thereof are disclosed. The amisulpride derivative disclosed herein or a pharmaceutical composition thereof may have better membrane permeability compared to amisulpride. The amisulpride derivative disclosed herein or a pharmaceutical composition thereof may be used for antagonizing dopamine and/or serotonin (e.g., 5-HT2a) and/or α2 receptor in a subject, either individually or in combination with other CNS active agents. The amisulpride derivative disclosed herein or a pharmaceutical composition thereof may be used for treating one or more conditions responsive to modulation of dopamine and/or serotonin (e.g., 5-HT2a) and/or α2 receptor in a subject, either individually or in combination with other CNS active agents. The amisulpride derivative disclosed herein or a pharmaceutical composition thereof may be used for treating one or more disorders associated with an abnormality in levels of dopamine and/or serotonin in the brain, either individually or in combination with other CNS active agents.