Homovanillic Acid

**Semantic type:** Organic Chemical

**Definition:** A monocarboxylic acid that is a catecholamine metabolite. Homovanillic acid may be used a marker for metabolic stress, tobacco usage or the presence of a catecholamine secreting tumor, such as neuroblastoma or pheochromocytoma.

**Synonyms:** - (4-Hydroxy-3-methoxyphenyl)acetic Acid - 3-Methoxy-4-hydroxyphenylacetic Acid - 4-Hydroxy-3-methoxybenzeneacetic Acid - 4-Hydroxy-3-methoxyphenylacetic Acid - Acetic Acid, (4-Hydroxy-3-methoxyphenyl)- (8CI) - Benzeneacetic Acid, 4-Hydroxy-3-methoxy- - HMPA - HVA - Vanillacetic Acid