7979
The obtained polymer ( T24 ) was then activated by reaction with 4 - nitrophenyl chloroformate ( NPC ) in order to graft a cyclic peptide presenting an arginine - glycine - aspartic acid ( RGD ) motif .
 Chemical: 4 - nitrophenyl chloroformate; Chemical: NPC; Chemical: arginine; Chemical: glycine; Chemical: aspartic acid
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: 4 - nitrophenyl chloroformate; Chemical: NPC; Chemical: arginine; Chemical: glycine; Chemical: aspartic acid