l-dopa levodopa parkinson`s disease drug molecule. skeletal formula.

levodopa parkinsons disease drug molecule skeletal formula dopa ldopa dopamine dihydroxyphenylalanine norepinephrine noradrenaline catecholamine parkinson levo levorotary isomer decarboxylase mucuna velvet bean nootropic hydrogen carbon oxygen nitrogen atoms atomic molecular compound composition chemical chemistry structure line drawing flat icon