Adderall
The mixture is composed of equal parts racemic amphetamine and dextroamphetamine , which produces a ( 3:1 ) ratio between dextroamphetamine and levoamphetamine , the two enantiomers of amphetamine . 
<triplet> dextroamphetamine <subj> racemic amphetamine <obj> instance of <triplet> levoamphetamine <subj> racemic amphetamine <obj> instance of