30523
Motor facilitation induced by N / OFQ and NOP receptor antagonists was lost in D2R ( - / - ) and D2L ( - / - ) mice whereas motor inhibition induced by NOP receptor antagonists ( and pramipexole ) was lost in D2R ( - / - ) but preserved in D2L ( - / - ) mice .
 pramipexole
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 pramipexole