單項(xiàng)選擇題

Which statement is NOT TRUE about Ramelteon?

A、is an agonist at MT1 and MT2 melatonin receptors
B、has no direct effects on GABAergic neurotransmission in the central nervous system
C、affect the maintaining of circadian rhythms underlying the sleep-wake cycle
D、inhibit gluatmate receptor and has a depressant effect on CNS
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