26840
3 , 4 - Methylenedioxypyrovalerone and naphyrone had high affinity for radioligand binding sites on recombinant human dopamine ( hDAT ) , serotonin ( hSERT ) and norepinephrine ( hNET ) transporters , potently inhibited [ ( 3 ) H ] neurotransmitter uptake , and , like cocaine , did not induce transporter - mediated release .
 3 , 4 - Methylenedioxypyrovalerone, naphyrone, dopamine, serotonin, norepinephrine, [ ( 3 ) H ], cocaine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 3 , 4 - Methylenedioxypyrovalerone, naphyrone, dopamine, serotonin, norepinephrine, [ ( 3 ) H ], cocaine