20694
A novel series of ( S ) - phenylalanine derivatives with a 2 - cyanopyrrolidine moiety were designed and synthesized through a rational drug design strategy .
 Chemical: ( S ) - phenylalanine; Chemical: 2 - cyanopyrrolidine
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: ( S ) - phenylalanine; Chemical: 2 - cyanopyrrolidine