6684
The functional PEG ligands were synthesized starting from the acetonide - protected catechol initiator 2 , 2 - dimethyl - 1 , 3 - benzodioxole - 5 - propanol ( CA - OH ) for oxyanionic polymerization .
 Chemical: PEG; Chemical: acetonide; Chemical: catechol; Chemical: 2 , 2 - dimethyl - 1 , 3 - benzodioxole - 5 - propanol; Chemical: OH
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: PEG; Chemical: acetonide; Chemical: catechol; Chemical: 2 , 2 - dimethyl - 1 , 3 - benzodioxole - 5 - propanol; Chemical: OH