Complex sentence: Amineptine is an atypical tricyclic antidepressant (TCA) which selectively inhibits the reuptake of dopamine and to a lesser extent norepinephrine, in turn producing an antidepressant and mildly stimulant effect.
Split into simpler sentences: Amineptine is an atypical tricyclic antidepressant (TCA). Whereas most TCAs act primarily as serotonin-norepinephrine reuptake inhibitors (SNRIs), amineptine selectively inhibits the reuptake of dopamine and to a lesser extent norepinephrine, in turn producing an antidepressant and mildly stimulant effect.