7230
Design , synthesis and structure - activity relationship of new arginine vasopressin analogues containing proline derivatives in position 2 .
 Chemical: arginine vasopressin; Chemical: proline
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: arginine vasopressin, proline 
Answer:
 Chemical: arginine vasopressin; Chemical: proline