7129
New optimal conditions for regioselectively monosubstitution of beta - cyclodextrin at O - 2 position were then studied to access to key intermediates .
 Chemical: beta - cyclodextrin
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: beta - cyclodextrin 
Answer:
 Chemical: beta - cyclodextrin