3844
Superparamagnetic nanoparticles grafted with hyperbranched polyglycerol ( HPG ) and conjugated with methotrexate ( MTX ) ( MNP - g - HPG - MTX ) were synthesized via a sol - gel reaction followed by thiol - ene click chemistry and esterification reaction .
 Chemical: polyglycerol; Chemical: methotrexate; Chemical: MTX; Chemical: MTX; Chemical: thiol - ene
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: polyglycerol; Chemical: methotrexate; Chemical: MTX; Chemical: MTX; Chemical: thiol - ene