22438
In conclusion , although hop extract and especially 8 - PN are promising candidates as a relief for climacteric symptoms , data on the safety and efficacy is still scarce .
 Chemical: 8 - PN
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: 8 - PN