Vanillylmandelic acid
(重定向自Vanillyl mandelic acid)

![Norepinephrine degradation. Vanillylmandelic acid is shown at top right. Enzymes are shown in boxes.[2]](/uploads/202502/19/Noradrenaline_breakdown.svg4944.png)
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Vanillylmandelic acid (VMA) is a chemical intermediate in the synthesis of artificial vanilla flavorings and is an end-stage metabolite of the catecholamines, epinephrine, and norepinephrine. It is produced via intermediary metabolites.