hydroxydopamine

As nouns the difference between dopamine and hydroxydopamine

is that dopamine is (label) a neurotransmitter associated with movement, attention, learning, and the brain’s pleasure and reward system while hydroxydopamine is any hydroxy derivative of dopamine, but especially 6-hydroxydopamine that is used experimentally to induce parkinson's disease in animals.

As an adjective hydroxy

is (chemistry) being, or containing a hydroxyl radical.

As a noun hydroxydopamine is

any hydroxy derivative of dopamine, but especially 6-hydroxydopamine that is used experimentally to induce parkinson's disease in animals.