26448
Additional studies suggest the possibility that TBAF chelation by neighboring acyl groups may account for the unexpected regioselectivity at the secondary alcohol esters that is observed in the TBAF deacylation of cellulose esters .
 Chemical: TBAF; Chemical: acyl; Chemical: secondary alcohol esters; Chemical: TBAF; Chemical: esters
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: TBAF; Chemical: acyl; Chemical: secondary alcohol esters; Chemical: TBAF; Chemical: esters