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Initially , we confirmed that G protein - coupled receptor 147 ( GPR147 ) was distributed in isolated hypothalamic , anterior pituitary and ovarian granulosa cells , suggesting that RFRP - 3 could act on these cells in vitro .
 RFRP - 3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 RFRP - 3