14877
The conjugates were synthesized using an efficient multistep protection / deprotection method resulting in the formation of a covalent bond between the primary hydroxyl group of Ara - C and dendrimer / PEG .
 hydroxyl, Ara - C, PEG
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 hydroxyl, Ara - C, PEG