dopamine poster, banner in realistic glossy style.

hormone dopamine happy reward chemistry emotion biochemistry molecule formula psychology positive antagonist neurotransmitter mind dopaminergic health synapse hormonal mood chemical structure peptide agonist biology d2 d3 oxytocin ldopa molecular serotonin production atom symbol norepinephrine happiness 3d estrogen illustration hormones wellness monoamine opioid pleasure vector c8h11no2