neurotransmitters on watercolor background

dopamine serotonin vector norepinephrine molecules formula watercolor purple antidepressants artistic illustration biology molecular structure neurology scientific noradrenaline chemistry art colorful background creative vibrant painting chemical bond brain neurons synapse neural receptors neurotransmission depression ssris neuroscience pharmacology psychopharmacology abstract adrenaline isolated icon neurotransmitter monoamine catecholamine epinephrine hormone neurochemistry happy science visual