( Mirapexin ( ( is ( ( a ( dopamine agonist ) ) ( which ( stimulates ( ( dopamine receptors ) ( in ( the brain ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Mirapexin)) (VP (VBZ is) (NP (NP (DT a) (JJ dopamine) (NN agonist)) (SBAR (WHNP (WDT which)) (S (VP (VBZ stimulates) (NP (NP (JJ dopamine) (NNS receptors)) (PP (IN in) (NP (DT the) (NN brain))))))))) (. .)))
Mirapexin is a dopamine agonist which stimulates dopamine receptors in the brain.
(ROOT (S (NP (NNP Addiction)) (VP (VBZ affects) (NP (NP (DT the) (JJ dopamine) (NNS receptors)) (PP (IN within) (NP (DT the) (NN brain))))) (. .)))