11822
The presence of alkynyl side groups in the PEG - PPLG copolymers allowed convenient further functionalization with azide - modified bioactive molecules , such as biotin and galactose .
 Chemical: alkynyl; Chemical: PEG - PPLG; Chemical: azide; Chemical: biotin; Chemical: galactose
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: alkynyl; Chemical: PEG - PPLG; Chemical: azide; Chemical: biotin; Chemical: galactose