8144
A new class of non - ionic dendronized multiamphiphilic polymers is prepared from a biodegradable ( AB ) n - type diblock polymer synthesized from 2 - azido - 1 , 3 - propanediol ( azido glycerol ) and polyethylene glycol ( PEG ) - 600 diethylester using Novozym - 435 ( Candida antarctica lipase ) as a biocatalyst , following a well - established biocatalytic route .
 2 - azido - 1 , 3 - propanediol, azido glycerol, polyethylene glycol, PEG, diethylester
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 2 - azido - 1 , 3 - propanediol, azido glycerol, polyethylene glycol, PEG, diethylester