21477
The organic layers were prepared by thermal hydrosilylation of two different alkene molecules with either a long carbon chain ( C11 ) or a shorter one ( C7 ) , and both were modified to be amine - terminated .
 carbon, amine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 carbon, amine