20693
Design , Synthesis , Biological Evaluation , and Docking Studies of ( S ) - Phenylalanine Derivatives with a 2 - Cyanopyrrolidine Moiety as Potent Dipeptidyl Peptidase 4 Inhibitors .
 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