14128
A series of mono - substituted 4 - phenylpiperidines and - piperazines have been synthesized and their effects on the dopaminergic system tested in vivo .
 Chemical: mono - substituted 4 - phenylpiperidines and - piperazines
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: mono - substituted 4 - phenylpiperidines and - piperazines