9941
An efficient synthesis and radiolabeling of a biphenylthiol , FLIP - IDAM , 4 , was accomplished .
 biphenylthiol, FLIP - IDAM
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 biphenylthiol, FLIP - IDAM