24222
RFamide - related peptide - 3 ( RFRP - 3 ) has been proposed as a key inhibitory regulator of mammalian reproduction .
 RFamide - related peptide - 3, RFRP - 3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 RFamide - related peptide - 3, RFRP - 3