Complete the following tree of reactions by supplying the missing reagents: 
Definitions:
Energetic
Having or showing vitality and a high level of energy or enthusiasm.
Neurotransmitters
Chemical messengers that transmit signals across a chemical synapse from one neuron to another target neuron.
Neurons
Specialized cells in the nervous system that transmit information to other nerve cells, muscle, or gland cells.
Unipolar Depression
A major depressive disorder characterized by a persistent feeling of sadness or lack of interest in external stimuli, affecting a person's thoughts, behavior, and feeling of well-being.
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