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We hypothesized that the effects of oroxylin A were exerted via the GABA - A receptor given the important role of the GABAergic system in ADHD .
 Chemical: oroxylin A; Chemical: GABA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: oroxylin A; Chemical: GABA