4513
These effects were not mediated by a dopaminergic mechanism as nefiracetam , at millimolar concentrations , failed to displace either [ 3H ] SCH 23390 or [ 3H ] spiperone binding from D1 or D2 dopamine receptor subtypes , respectively .
 Chemical: nefiracetam; Chemical: SCH 23390; Chemical: spiperone; Chemical: dopamine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: nefiracetam; Chemical: SCH 23390; Chemical: spiperone; Chemical: dopamine