Serotonin molecular structure. neurotransmitter molecule. Happyness funny concept. Skeletal chemical formula. Hormone of happiness and joy. Vector line illustration isolated on yellow premium vector by NeMaria

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graphic element illustration isolated happy sign model happiness joy medicine medical line formula symbol emotion icon structure organic mood biology chemical laboratory science chemistry depression drug feeling atom atomic physics scientific bionic bio brain carbon biochemistry compound molecule molecular physiology nervous Euphoria structural metabolism antidepressant hormone atoms endorphin serotonin dopamine

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