10367
To develop a safe , effective , and biocompatible gene delivery vector , a series of hydrophobic amino acid grafted chitosan ( AGC ) derivatives were synthesized by carbodiimide mediated coupling reaction .
 Chemical: amino acid; Chemical: carbodiimide
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: amino acid; Chemical: carbodiimide