20500
Several indolyl - 3 - acetonitrile derivatives were synthesized as arvelexin analogs and evaluated for their abilities to inhibit NO and PGE2 productions in LPS - induced RAW 264 . 7 cells .
 Chemical: indolyl - 3 - acetonitrile; Chemical: arvelexin; Chemical: NO; Chemical: PGE2
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: indolyl - 3 - acetonitrile; Chemical: arvelexin; Chemical: NO; Chemical: PGE2