19825
For the Q8 cage , the presence of the OSiMe2 spacer groups which tether the alkyl chain arms to the cage ( absent in the T8 cages ) allows greater flexibility of the arms letting them interdigitate with each other when packing which is not observed for the analogous T8 cages .
 Chemical: OSiMe2
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: OSiMe2 
Answer:
 Chemical: OSiMe2