dopamine molecule structure on the classroom blackboard in realistic hand writing style.

hormone dopamine happy reward chemistry emotion biochemistry molecule formula psychology lesson antagonist neurotransmitter mind dopaminergic health synapse hormonal mood chemical structure peptide agonist biology d2 d3 oxytocin ldopa molecular blackboard production atom symbol norepinephrine happiness chalk estrogen illustration chalkboard wellness monoamine opioid pleasure vector c8h11no2