25547
Theoretical analysis indicates that the molecule is connected directly to one electrode through the central fluorene , and that to bind it to the gold fully it has to be pushed through a layer of adsorbates naturally present in the experiment .
 Chemical: fluorene
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: fluorene