8795
However , the extent of photochemical coupling of a primary amine was significantly greater for the aryl azides than for the diazirine .
 primary amine, aryl azides, diazirine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 primary amine, aryl azides, diazirine